Output? 
#include<stdio.h>
void add(int a, int b);
void main ()
{
int a, b;
printf("enter two numbers\n");
scanf("%d%d",&a,&b);
add(a,b);
}
void add(int a,int b)
{
int sum;
sum=a+b;
printf("sum=%d",sum) ;
}
 

Take a=1, b=2

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