#include<stdio.h>
int main()
{   int A,B;

    scanf("%d %d",&A,&B);

    printf("%d\n",A+B);

    return 0;
}

#include<stdio.h>
int main()
{   int a,b,c;
do{
    printf("请输入两个数字用空格键隔开:");
    scanf("%d %d",&a,&b);
    c = a+b;
    printf("%d + %d = %d\n",a,b,c); 
}while(c != 0); //输入两个0退出
    return 0;
}