loop(2)

1:
#include <stdio.h>
/// if else basic:

int main()
{
int a;
printf("Please enter a number greter than five:");
scanf("%d",&a);
if(a>=5)
    printf("%d",a*a);
else
    printf("ERROR!!!\n");
return 0;
}

output: depend on your value

2:
#include <stdio.h>
///nested if else:

int main()
{
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if(a>b)
{
if(a>c)
printf("The result is:%d",a);
else
    printf("The result is:%d",c);
}
else
{
    if(b>c)
        printf("The result is:%d",b);
    else
        printf("The result is:%d",c);
}
return 0;
}

output: depend on your value

3:
#include <stdio.h>
///if else ladder:

int main()
{
int mark;
scanf("%d",&mark);
if(mark>=80) printf("your grade point is:+A");
else if(mark>=70) printf("your grade point is:A");
else if(mark>=60) printf("your grade point is:-A");
else if(mark>=50) printf("your grade point is:B");
else if(mark>=40) printf("your grade point is:C");
else printf("Failed!!!");
return 0;
}


output: depend on your value

loop(1)

1:
#include <stdio.h>
///*** compound statement:
int main()
{
int a;
if(5>10){
    scanf("%d",&a);
    printf("%d",5-a);
}
else
    printf("(The first condition is wrong)\n");
return 0;
}




output: The first condition is wrong

2:
#include <stdio.h>
///The program will print odd number:

int main()
{
int a,b;
for(b=1;b<=5;b++){
    a=(2*b-1);
    printf(" %d ",a);
    if(a>=9)
        break;
}
return 0;
}

output: 1 3 5 7 9

3:
#include <stdio.h>
///The program will print even number:

int main()
{
int a,b;
for(b=1;b<=5;b++){
    a=(2*b-1)+1;
    printf(" %d ",a);
    if(a>=10)
        break;
}
return 0;
}
 
output: 2 4 6 8 10

switch case

1:
#include<stdio.h>
///vowel_consonent
int main(){

     char vowel;
     scanf("%c",&vowel);

     switch(vowel){

        case 'a': printf("It is vowel");
        break;

        case 'e': printf("It is vowel");
        break;

        case 'i': printf("It is vowel");
        break;

        case 'o': printf("It is vowel");
        break;

        case 'u': printf("It is vowel");
        break;

        default:printf("It is consonent");
        break;

     }
return 0;
}

output: depend on your value

2:
#include <stdio.h>
///switch case:

int main()
{
int number;
scanf("%d",&number);
switch(number){
case 1:
    printf("The number is 1\n");
    break;
    case 2:
    printf("The number is 2\n");
    break;
    case 3:
    printf("The number is 3\n");
    break;
}
return 0;
}

output: depend on your value

Basic input & output(2)

1:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%d",12345);
return 0;
}

output: 12345

2:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%5d",123);
return 0;

}

output:  123
///***it will show two space before 123





3:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%-5d %-5d",123,456);
return 0;

}

output:123  456

4:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%05d%5d",123,456);
return 0;

}

output: 00123  456

5:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%6.2f",12.0);
return 0;

}


output:  12.00  ///***one space before 12.00


 6:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%*.2f",6,12.0);
return 0;

}

output:  12.00

7:
#include<stdio.h>
///***formatted output:
int main( )
{
printf("%10.*f",2,12.0);
return 0;

}

output:     12.00 ///***five space before 12.00




 

Basic input & output(1)

1:
#include <stdio.h>
///***input operation:
int main(){
   
      int a;
      scanf("%4d",&a);
      printf("%d",a);
     
      return 0;
}

input: 123456

output:1234

2:
#include<stdio.h>
///***printf rules:
int main(){
   
      int a=5,b=6;
      printf("%d %d %d",b,a,a+b);
      return 0;
}

output: 6 5 11

3:
#include<stdio.h>
///***printf function works from the right side
int main(){
   
      int a,b;
      printf("%d %d %d",a+b,b=5,a=4);
      return 0;
}

output:9 5 4

4:

#include<stdio.h>
///***printf function works from the right side
int main(){
   
      int a,b;
      printf("%d %d %d",b=5,a=4,a+b);
      return 0;
}

output: 5 4 garbage
///***because printf function works from the right side

Math(5)

1:
 #include<stdio.h>
///***subtraction without using(-)
int main(){
  
    int a,b;
    int sum;
    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);
    sum = a + ~b + 1;
    printf("Difference of two integers: %d",sum);

    return 0;
}

output: depend on your value


///***(a+(-b-1)+1=ans

2:
 #include<stdio.h>
///***addition without using(+)
int main(){

    int a,b;
    int sum;

    printf("Enter any two integers: ");
    scanf("%d%d",&a,&b);
    sum = a - ~b -1;
    printf("Sum of two integers: %d",sum);

    return 0;
}

output: depend on your value

///***(a-(-b+1)+1

3:
#include <stdio.h>
///***find largest number
int main(){
      int a, b, c;
      printf("Enter three numbers: ");
      scanf("%d %d %d", &a, &b, &c);
      if(a>=b && a>=c)
         printf("Largest number = %d", a);
      if(b>=a && b>=c)
         printf("Largest number = %d", b);
      if(c>=a && c>=b)
         printf("Largest number = %d", c);
      return 0;
}



output: depend on your value

Math(4)

1:
#include<stdio.h>
///***NCR
int main(){
  int n,r,ncr;
  printf("Enter any two numbers->");
  scanf("%d %d",&n,&r);
  ncr=fact(n)/fact(r)*fact(n-r);
  printf("The NCR factor of %d and %d is %d",n,r,ncr);
  return 0;
}
 int fact(int n){
  int i=1;
  while(n!=0){
      i=i*n;
      n--;
  }
  return i;
 }



output: depend on your value

2:

#include<stdio.h>
///***NPR
int main(){
  int n,r,ncr;
  printf("Enter any two numbers->");
  scanf("%d %d",&n,&r);
  ncr=fact(n)/fact(n-r);
  printf("The NPR factor of %d and %d is %d",n,r,npr);
  return 0;
}
 int fact(int n){
  int i=1;
  while(n!=0){
      i=i*n;
      n--;
  }
  return i;
 }

output: depend on your value

3:
#include<stdio.h>
///***Leap year
int main(){
    int year;

    printf("Enter any year: ");
    scanf("%d",&year);

    if(((year%4==0)&&(year%100!=0))||(year%400==0))
         printf("%d is a leap year",year);
    else
         printf("%d is not a leap year",year);

    return 0;
}

output: depend on your value

Math(3)

1:
 #include <stdio.h>
///***celsius-farenheit 
 int main()  
 {  
     double celsius, farenheit;  
     printf("Enter the temperature in celsius: ");  
     scanf("%lf", &celsius);  
     farenheit = 1.8 * celsius + 32;  
     printf("Temperature in farenheit is: %.2lf\n", farenheit);  
     return 0;  
 }

output:   depend on your value

2:
#include<stdio.h>
///***L.C.M
int main(){
    int x,y,m,i;
    printf("Insert any two number: ");
    scanf("%d%d",&x,&y);
     if(x>y)
          m=y;
     else
          m=x;
     for(i=m;i>=1;i--){
          if(x%i==0&&y%i==0){
              printf("L.C.M of two number is : %d",x*y/i) ;
              break;
          }
     }
     return 0;
 }


output:   depend on your value

3:
#include<stdio.h>
///***G.C.D
int main(){
    int x,y,m,i;
    printf("Insert any two number: ");
    scanf("%d%d",&x,&y);
     if(x>y)
          m=y;
     else
          m=x;
     for(i=m;i>=1;i--){
          if(x%i==0&&y%i==0){
              printf("GCD of two number is : %d",i) ;
              break;
          }
     }
     return 0;
 }



output:   depend on your value





 

Math(2)

1:
#include<stdio.h>
///***trapezium

int main(){
float b1,b2,h;
float area;
printf("Enter the size of two bases and height of the trapezium : ");
scanf("%f%f%f",&b1,&b2,&h);
area = 0.5 * ( b1 + b2 ) * h ;
printf("Area of trapezium is: %.2f",area);
return 0;
}

output:depend on your value

2:
#include<stdio.h>
#include<math.h>
///***equilateral triangle
int main(){

    float a;
    float area;
    printf("Enter size of side of the equilateral triangle : ");
    scanf("%f",&a);
    area = sqrt(3)/4*(a*a);
    printf("Area of equilateral triangle is: %.2f",area);
    return 0;
}



output:depend on your value

3:
 #include<stdio.h>
///***cube surface and volume
int main(){

    float a,surface,volume;
    printf("Enter size of any side of a cube : ");
    scanf("%f",&a);
    surface= 6 * (a * a);
    volume = a * a * a;
    printf("Surface area of cube is: %.2f",surface);
    printf("Volume of cube is : %.2f",volume);
    return 0;
}




output:depend on your value

3:
#include<stdio.h>
#define PI 3.141
///***perimeter of circle
    int main()
    {
    float r;
    printf("Enter the radius value:");
    scanf("%f",&r);
    printf("Area of circle : %.2f ", PI*r*r);
    printf("Perimeter of the circle : %.2f ", 2*PI*r);
    return 0;
    }
 

Math(1)

1:
#include<stdio.h>
#include<math.h>
///***triangle
int main(){
    float a,b,c;
    float s,area;
    printf("Enter size of each sides of triangle:");
    scanf("%f%f%f",&a,&b,&c);
    s = (a+b+c)/2;
    area = sqrt(s*(s-a)*(s-b)*(s-c));
    printf("Area of triangle is: %.2f",area);
    return 0;
}


output: depend on your value

2:
#include<stdio.h>
///***rectangle
int main(){
    float l,w;
    float area;
    printf("Enter size of each sides of the rectangle : ");
    scanf("%f%f",&l,&w);
    area = l * w;
    printf("Area of rectangle is: %.2f",area);
    return 0;
}


output: depend on your value 

3:
#include <stdio.h>
#define PI 3.141
///***circle
int main(){
float r, area;
printf("Please enter Radius of circle: ");
scanf("%f", &r);
area = PI * r * r;
printf("Area of cirle is:%.2f\n", area);
return 0;
}

output: depend on your value

conditional logic(2)

1:
 #include <stdio.h>
 ///***or condition
 int main()
 {
     int num =3;
     if(num >= 1 || num <= 10) {
         printf("yes\n");
     }
     else {
         printf("no\n");
     }
     return 0;
 }


output: yes

2:
 #include <stdio.h> 
///***and condition
 int main()  
 {  
     int num = -5;  
     if(num >= 1 && num <= 10) {  
         printf("yes\n");  
     }  
     else {  
         printf("no\n");  
     }  
     return 0;  
 }  

output: no

3:
 #include <stdio.h>
 ///***check upeer and lower case letter
 int main()
 {
     char ch = 'M';
     if(ch >= 'a' && ch <= 'z') {
         printf("It is lower case\n");
     }
     else if(ch >= 'A' && ch <= 'Z') {
         printf("It is upper case\n");
     }
     return 0;
 }




output: It is upper case

conditional logic(1)

1:
 #include <stdio.h>
  ///*** positive or negative or zero:
 int main()
 {
     int num;
     printf("Enter a number:");
     scanf("%d",&num);
     if(num > 0) {
         printf("The number is positive\n");
     }
      if(num == 0) {
         printf("The number is zero\n");
     }
     if(num<0) {
         printf("The number is negative\n");
     }
     return 0;
 }





output: depend on your value

2:
 #include <stdio.h>
 ///*** prove even odd
 int main()
 {
     int number,sum;
     printf("Enter a number:");
     scanf("%d",&number);
     sum=number%2;
     if(sum==0) {
         printf("The number is even\n");
     }
     else {
         printf("The number is odd\n");
     }
     return 0;
 }
 
output: depend on your value

3: 
 #include <stdio.h>
 ///*** prove vowel consonant
 int main()
 {
char alphabet;
printf("Enter a alphabet:");
scanf("%c",&alphabet);
if(alphabet=='a'){
    printf("It is vowel");
}
if(alphabet=='e'){
    printf("It is vowel");
}
if(alphabet=='i'){
    printf("It is vowel");
}
if(alphabet=='o'){
    printf("It is vowel");
}
if(alphabet=='u'){
    printf("It is vowel");
}
else {
    printf("It is consonant");
}
return 0;
 }

output: depend on your value

operator(6)

1:
#include <stdio.h>
///conditional operator:

int main ()
{
int a,b,c;
a=5;b=10;
c=(a<b)? a:b;
printf("%d",c);
return 0;
}

output: 5

2:
#include <stdio.h>
///conditional operator:

int main ()
{
int a,b,c;
a=5;b=10;
c=(a>b)? a:b;
printf("%d",c);
return 0;
}

output: 10

3:
#include <stdio.h>
///comma operator:
int main()
{
int a,b,cma;
cma=(a=7,b=5,a-b);
printf("%d",cma);
return 0;
}
 
 output: 2

4:
#include <stdio.h>

int main()
{
int a=5,b=6;
printf("%d %d %d",a,b,a+b);
return 0;
}
 
output: 5 6 11

operator(5)

                                                                Bitwise operator


1:
#include <stdio.h>
///bitwise operator:

int main()
{
int a,b;
a=5;b=6;
printf("%d %d %d",a&b,a|b,a^b);
return 0;
}

output:4 7 3

2:
#include <stdio.h>
///left shift -right shift

int main()
{
 int a;
 a=3;
 printf("%d %d",a<<1,a>>1);
 return 0;
}

output: 6 1

3:
#include <stdio.h>
///conditional operator:
int main()
{
 int a,b;
 a=5;b=10;
 (a<b)? printf("%d",a) : printf("%d",b);
 return 0;
}
 
output: 5

operator(4)

1:
#include <stdio.h>
///logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=(ssc==5 || hsc==6);
printf("%d",prove);
return 0;

}

output: 1

2:
#include <stdio.h>
///logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=!(ssc==5);
printf("%d",prove);
return 0;

}
 
output: 0

3:
#include <stdio.h>
///logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=!(ssc==5,hsc==5);
printf("%d",prove);
return 0;

}
 
output: 0

4:
#include <stdio.h>
///logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=(ssc==5 && hsc==5);
printf("%d",prove);
return 0;

}

output:1

5:
#include <stdio.h>
///logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=(ssc==5 || hsc==6);
printf("%d",prove);
return 0;

}

output: 1

/***condition true=1
/***condition false=0

operator(3)

1:

#include <stdio.h>
///***decrement operator:

int main()
{
int a,b;
a=7;
a--;
printf("%d\n",a);
--a;
printf("%d\n",a);
b=a--;
printf("%d %d\n",a,b);
b=--a;
printf("%d %d\n",a,b);
return 0;
}

output: 6
              5
              4 5
              3 3

2:
#include <stdio.h>
///relation operator:

int main()
{
 int a=5,b=6,condition;
 condition=a>b;      ///if-true=1,false=0
 printf("%d",condition);
 return 0;
}
///*** !=not equal
///*** c=a>=b---wrong--0
///*** c=a<=b---true--1
///*** c=a!=b---true--1
///***c=a==b---false-0
///*** a=b=c ---6

output: 0 ///***condition is wrong so ans is 0

3:
#include <stdio.h>
///***logical operator:

int main()
{
int ssc,hsc,prove;
ssc=5;hsc=5;
prove=(ssc==5 && hsc==5);
printf("%d",prove);
return 0;

}


output:  1

operator(2)

1:
#include <stdio.h>


int main()
{
float a,b,sum;
a=5;b=2;
sum=a/b;
printf("%.0f / %.0f=%.2f",a,b,sum);
return 0;
}


output: 2.50

2:
#include <stdio.h>
///***assignment operator:

int main()
{
int a=5,b=6;
a+=5;
a-=b;
printf("%d %d",a,b);
return 0;
}


output: 4 6

3:
#include <stdio.h>
///***increment operator:

int main()
{
int a,b;
a=5;
a++;
printf("%d\n",a);
++a;
printf("%d\n",a);
b=a++;
printf("%d %d\n",a,b);
b=++a;
printf("%d %d\n",a,b);
return 0;
}

output: 6
              7
              8 7
              9 9 

operator(1)

1:
operator-
///*** arithmatic operator
///***1.integer arithmatic= +,-,*,/,%
///***2.real arithmatic(float,double-forall)=(+,-,/,*)







2:
 #include <stdio.h>
///***integer arithmatic.
int main()
{
int a,b,sum;
printf("please enter 1st number:",a);
scanf("%d",&a);
printf("please enter 2nd number:",b);
scanf("%d",&b);
sum= a+b;
printf("%d + %d =%d",a,b,sum);
return 0;
}


input: 5 2
output: 7

3:
#include <stdio.h>
///***integer arithmatic:(modulas)
int main()
{
int a,b,sum;
printf("please enter 1st integer:",a);
scanf("%d",&a);
printf("please enter 2nd integer:",b);
scanf("%d",&b);
sum= a%b;
printf("%d mod with %d=%d",a,b,sum);
return 0;
}


input: 5 2
output: 1

4:
#include <stdio.h>
int main ()
{
    int a,b,c;
    a=1;b=2;
    printf("before interchange a=%d b=%d\n",a,b);
    c=a;
    a=b;
    b=c;
    printf("after interchange a=%d  b=%d",a,b);
    return 0;
}
 
output: a=2
              b=1

Datatype(4)

1:
 #include <stdio.h>  
 int main()  
 {  
     int a, b, sum;  
     a = 10;  
     b = 2;  
     sum = a / b;  
     printf("%d\n", sum);  
     return 0;  
 }

output:  5

2:
 #include <stdio.h>  
 int main()  
 {  
     int a, b, sum;  
     a = 10;  
     b = 2;  
     sum = a - b;  
     printf("%d\n", sum);  
     return 0;  
 }

output: 8

3:
#include <stdio.h>  
 int main()  
 {  
     double a, b, sum;  
     a = 5;  
     b = 2;  
     sum = a / b;  
     printf("%.2lf\n", sum);  
     return 0;  
 }

output:  2.50

/***here %lf is double idientifier***/

4:
#include <stdio.h>  
 int main()  
 {  
     double a, b, sum;  
     a = 2.5;  
     b = 2;  
     sum = a * b;  
     printf("%.2lf\n", sum);  
     return 0;  
 }

output:  5.00

Datatype(3-ASCII value)

1:
#include <stdio.h>
///***ASCII value:
int main()
{
char num;
num=78;
printf("%c",num);
return 0;
}
output: N
/***here %c identifies 78th number ASCII value which is N ***/

2:
int main()
{
char num;
num='N';
printf("%c",78);/// ***here printf will show character value of num
return 0;
}

output: N

Datatype(2-sizeof)

1:
#include <stdio.h>
///***size of character:
int main()
{
 char ch;
ch=5;
printf("char=%d byte",sizeof(char));
return 0;
}

output: 1

2:
#include <stdio.h>
///***size of integer:
int main()
{
 int ch;
ch=5;
printf("int=%d byte",sizeof(int));
return 0;
}

output:  4

3:
#include <stdio.h>
///***size of float:
int main()
{
float ch;
ch=5;
printf("float=%d byte",sizeof(float));
return 0;
}

output:  4

4:
#include <stdio.h>
///***size of double:
int main()
{
double ch;
ch=5;
printf("Double=%d byte",sizeof(double));
return 0;
}

output:  8

/***little discussion:
#char= 1 byte=8 bit
  int= 4 byte=32 bit
 float= 4 byte=32 bit
double= 8 byte=64 bit

Datatype(1)

1:
 #include <stdio.h>  
/***Datatype(1)

 int main()  
 {  
     int a,b,sum;  
    a=3,b=6;
    sum = a + b;  
    printf(" %d\n", sum);  
     return 0;  
 }  

output: 9
/***guys /n using for new line***/
/***here %d is an identifier of int***/

2:
#include <stdio.h>
/***Datatype(1)
int main()
{
int a,b;
a=6;
b=6+a;
printf("%d\n",b);
return 0;
}

output: 12

3:
#include <stdio.h>
/***Datatype(1)
int main()
{
int a=5,b=6,sum;
sum=a*b;
printf("The multiplication is:%d\n",sum);
return 0;
}

output: 30

c programming(start-printf)

1:
#include<stdio.h>

int main( )
{
    printf("Hello world");
    return 0;
}

output: Hello world

2:(without using semicolon(;))
#include<stdio.h>

void main( )
{
while(!printf("Hello world") ){
}
}

3:
#include <stdio.h>

///***it will change your bg clor and font color:
int main()
{
    system("color 0C");
    printf("Hello world");
    return 0;
}

output: Hello world

4:
#include <stdio.h>
///***without using semicolon

void main()
{
    system("color 0C");
    if(printf("Hello world")){
    }
}



output: Hello world

5:
#include <stdio.h>
///***without using semicolon

void main()
{
    system("color 0C");
    switch(printf("Hello world)){
    }
}

output: Hello world
///***here 0 use for background color and C is use for font color:follow this pattern
///***0=Black        A=Light green
         1= Blue         B=Light Aqua
         2=Green        C=Light Red
         3=Aqua         D=Light Purple
         4=Red           E=Light Yellow
         5=Purple       F=Bright White
         6=Yellow
         7=White
         8=Gray
         9=Light Blue

My Vision

Hi there! I am Koushik. I'm in love with my computer. <3 Solving problems is

my passion and I've come to realize how easy it is to do so with computer

programming.

I work daily on problems and solve a tiny chunk of them bit by bit. Learning

new things along the way I've seen ways to look at things. It's a form of

art to me or maybe more. With all the help I get from the internet, I wish

to share what ever I learned even if it is very little.

I'm currently working with the 'C' programming language. Hope everyone finds

my solutions interesting. I'll be happy if these helped even a
person in this world.

Adios :)