C语言 求两个数的和示例:

#include<stdio.h>
void main()
{
int a,b,sum;
a=12;b=56;
sum=a+b;
printf("sum is %d\n",sum);
}

-----

#include<stdio.h>
int main()
{
int a,b,sum;
a=12;b=56;
sum=a+b;
printf("sum is %d\n",sum);
}