#include <stdio.h>
#include<string.h>
int main()
{
int i ;
char temp ;
char profile[2][10] = {"koushik","Akif"} ;
printf ( "\nBefore swapping: %s %s", &profile[0][0], &profile[1][0] ) ;
for ( i=0 ; i <=10 ; i++ )
{
temp = profile[0][i] ;
profile[0][i] = profile[1][i] ;
profile[1][i] = temp ;
}
printf ( "\nAfter swapping: %s %s", &profile[0][0], &profile[1][0] ) ;
}
output:
#include<stdio.h>
#include<string.h>
int main()
{
char str1[20];
int i, j, count=0, prove=0;
printf("\nEnter any string: ");
gets(str1);
for (i=0; str1[i]!='\0'; i++)
{
count++;
}
for(i=0,j=count-1;i<count-1;i++,j--)
{
if (str1[i] != str1[j])
{
prove = 1;
break;
}
}
if (prove == 0)
printf("\nString is palindrome");
else
printf("\nString is not palindrome");
return 0;
}
output:
#include <stdio.h>
#include <string.h>
int main ()
{
int c = 0;
char ch, s[1000];
printf("Input a string\n");
gets(s);
for(c=0;s[c] != '\0';c++) {
ch = s[c];
if (ch >= 'A' && ch <= 'Z')
s[c] = s[c] + 32;
else if (ch >= 'a' && ch <= 'z')
s[c] = s[c] - 32;
}
printf("%s\n", s);
return 0;
}
#include <stdio.h>
#include <string.h>
int main()
{
char a[100],b[100];
while(1){
printf("Enter the string to check if it is a palindrome:");
scanf("%s",a);
strcpy(b,a);
strrev(b);
if (strcmp(a,b) == 0)
{
printf("Entered string is a palindrome.\n");
}
else
{
printf("Entered string is not a palindrome.\n");
break;
}
}
return 0;
}
#include <stdio.h>
#include<string.h>
int main()
{
char s1[100], s2[100], i, j;
printf("Enter first string: ");
scanf("%s",s1);
printf("Enter second string: ");
scanf("%s",s2);
for(i=0; s1[i]!='\0'; i++);
for(j=0; s1[i]+s2[j]!='\0';i++,j++)
{
s1[i]=s2[j];
}
s1[i]='\0';
printf("After concatenation: %s",s1);
return 0;
}
#include <stdio.h>
#include <string.h>
int main()
{
char str1[100], str2[100], i;
printf("\n");
printf("input string : ");
scanf("%s",str1);
for(i=0; str1[i]!='\0';i++)
{
str2[i]=str1[i];
}
str2[i]='\0';
printf("\noutput String: %s\n",str2);
return 0;
}
#include<stdio.h>
#include<string.h>
int main()
{
char str[100],i,count=0;
printf("Enter a string: ");
scanf("%s",str);
for(i=0; str[i]!='\0'; i++){
count++;
}
printf("Length of string: %d",count);
return 0;
}
#include<stdio.h>
#include<string.h>
///reverse a sentence
int main()
{
int i,length,count=0;
char ch[20];
printf("Enter the string:");
gets(ch);
length=strlen(ch);
for(i=0; i<length; i++)
{
count++;
}
printf("Reverse is:");
for(i=count-1; i>=0; i--)
{
printf("%c",ch[i]);
}
return 0;
}
#include<stdio.h>
#include<string.h>
/***
///reverse a word
int main()
{
int i,count=0;
char ch[20];
printf("Enter the string:");
gets(ch);
for(i=0; ch[i]!='\0'; i++)
{
count++;
}
printf("Reverse is:");
for(i=count-1; i>=0; i--)
{
printf("%c",ch[i]);
}
return 0;
}
#include<stdio.h>
int Max(int arr[],int size);
int main(){
int arr[100],max,i,size;
printf("Enter the size of the array: ");
scanf("%d",&size);
printf("Enter %d elements of an array: ", size);
for(i=0;i<size;i++)
scanf("%d",&arr[i]);
max=Max(arr,size);
printf("Largest element of an array is: %d",max);
return 0;
}
int Max(int arr[],int size){
static int i=0,max =-99;
if( i<size){
if(max<arr[i])
max=arr[i];
i++;
Max(arr,size);
}
return max;
}
#include<stdio.h>
int isPrime(int num,int i);
int main(){
int num,prime;
printf("Enter a positive number: ");
scanf("%d",&num);
prime = isPrime(num,num/2);
if(prime==1)
printf("%d is a prime number",num);
else
printf("%d is not a prime number",num);
return 0;
}
int isPrime(int num,int i){
if(i==1){
return 1;
}else{
if(num%i==0)
return 0;
else
isPrime(num,i-1);
}
}
#include<stdio.h>
int multiply(int a,int b);
int main(){
int a,b,result;
printf("Enter two integer: ");
scanf("%d%d",&a,&b);
result = multiply(a,b);
printf("Multiplication of two integer is:%d",result);
return 0;
}
int multiply(int a,int b){
static int result=0,i=0;
if(i < a){
result= result + b;
i++;
multiply(a,b);
}
return result;
}
#include <stdio.h>
int gcd(int a,int b);
int main()
{
int a, b, result;
printf("Enter the two numbers to find their GCD: ");
scanf("%d%d", &a, &b);
result = gcd(a, b);
printf("The GCD of %d and %d is:%d\n", a, b, result);
}
int gcd(int a, int b)
{
while (a != b)
{
if (a > b)
{
return gcd(a - b, b);
}
else
{
return gcd(a, b - a);
}
}
return b; ///return a
}
#include<stdio.h>
int sum(int n);
int main()
{
int n,concat;
printf("Enter an positive integer: ");
scanf("%d",&n);
concat=sum(n);
printf("Sum = %d",concat);
return 0;
}
int sum(int n)
{
if(n!=0)
return n+sum(n-1);
}
#include<stdio.h>
int Lcm(int a,int b);
int main(){
int a,b,Lcm;
printf("Please Enter Two Number: ");
scanf("%d%d",&a,&b);
if(a>b)
Lcm = lcm(a,b);
else
Lcm = lcm(b,a);
printf("LCM of %d and %d is:%d",a,b,Lcm);
return 0;
}
int lcm(int a,int b){
static int temp = 1;
if(temp % a == 0 && temp % b == 0)
{
return temp;
}
temp++;
lcm(a,b);
}
#include<stdio.h>
int factorial(int n);
int main()
{
int n;
printf("Enter an positive integer: ");
scanf("%d",&n);
printf("%d! = %d", n, factorial(n));
return 0;
}
int factorial(int n)
{
if(n==1 || n==0){
return 1;
}
else if (n!=1)
return n*factorial(n-1);
}
#include <stdio.h>
#include <stdlib.h>
struct calculator{
int add1,add2,sub1,sub2,div1,div2,mul1,mul2;
};
void display(struct calculator pos);
int main()
{
struct calculator cal;
printf("\nplease enter tow number for addition:");
scanf("%d %d",&cal.add1,&cal.add2);
printf("\nplease enter tow number for subtraction:");
scanf("%d %d",&cal.sub1,&cal.sub2);
printf("\nplease enter tow number for division:");
scanf("%d %d",&cal.div1,&cal.div2);
printf("\nplease enter tow number for multiplication:");
scanf("%d %d",&cal.mul1,&cal.mul2);
display(cal);
return 0;
}
void display(struct calculator pos){
printf("\n-------------------------------------\n");
printf("THIS IS A SIMPLE CALCULATOR");
printf("\n-------------------------------------\n");
printf("ADDITION= %d\n",pos.add1+pos.add2);
printf("\nSUBTRACTION= %d\n",pos.sub1-pos.sub2);
printf("\nDIVISION= %d\n",pos.div1/pos.div2);
printf("\nMULTIPLICATION= %d\n",pos.mul1*pos.mul2);
printf("\n-------------------------------------\n");
printf("SOLVED");
printf("\n-------------------------------------\n");
}
#include <stdio.h>
pass_arr( int arr[])
{
int i;
for( i=0; i<7; i++)
{
printf("arr[%d] is: %d \n", i, arr[i]);
}
}
int main()
{
int arr[] = {11, 22, 33, 44, 55, 66, 77};
pass_arr(arr);
return 0;
}
output:
arr[0] is: 11
arr[1] is: 22
arr[2] is: 33
arr[3] is: 44
arr[4] is: 55
arr[5] is: 66
arr[6] is: 77
