1) Program using function named 'sum' that add two input integer and return their sum.
#include<stdio.h>
int sum(int,int);
int main()
{
int a,b,c;
printf("Enter the value of a and b");
scanf("%d%d",&a,&b);
c=sum(a,b); // function calling
printf("sum of a and b is %d",c);
return 0;
}
// End of main function
// function definition of sum
int sum(int x,int y)
//where x and y are formal argument
{
int z;
z=x+y;
return z;
}
Output :--
Enter the value of a and b
10 5
sum of a and b is 15
2. program using a function that compare two input value
#include<stdio.h>
int main()
{
void compare(int, int);//function declaration
int a,b;
printf("Enter the value of a and b ");
scanf("%d%d",&a,&b);
compare(a,b); // function calling
return 0;
}// end of main function
// function definition compare
void compare(int x,int y)
{
if(x<y)
{
printf("%d is greater than %d ",x,y);
}
else
{
if(x==y)
{
printf("%d is equal to %d ",x,y);
}
else
{
printf(" %d is smaller than %d",x,y);
}
}
}
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