#include<stdio.h>

#include<stdlib.h>

int main()

{

int a, b, s;

printf("输入两个数");

scanf("%d%d",&a,&b);

s=a+b;

printf("和：%d\n",s);

system("PAUSE");

return 0;

}

//代码二

#include<stdlib.h>

#include<stdio.h>

int Sum( int x,int y);

int main()

{

int a,b,s;

printf("请输入两个数：");

scanf("%d%d",&a,&b);

s=Sum(a,b);

printf("和：%d\n",s);

system("pasue");

return 0;

}

int Sum(int x,int y)

{

int z;

z=x+y;

return z;

}