程序代码：

#include <stdio.h>

int main(int argc,char*argv[])
{
    int n1;
    int n2;
   
    printf("输入一个数值:20");
    scanf("%d",&n1);
   
    printf("输入一个数值:30");
    scanf("%d",&n2);
   
    printf("%d+%d=%d\n",n1,n2,n1+n2);
   
    return 0;
   
}