#include <stdio.h>
void main ()
{
  int a,b,sum;
  printf("please print the first number:");
  scanf("%d",a);
  printf("print another number:");
  scanf("%d",b);
  sum=a+b;
  printf("sum=%d\n",sum);
}

漏了取地址符'&'

哦，谢谢啦，改了，还是出错

error:expression syntax in function main

[ 本帖最后由 boy054 于 2009-10-22 17:53 编辑 ]

加上&就没错了

#include <stdio.h>
void main ()
{
  int a,b,sum;
  printf("please print the first number:");
  scanf("%d",&a);                          /*加上&就可以了*/
  printf("print another number:");
  scanf("%d",&b);                         /*加上&就可以了*/
  sum=a+b;
  printf("sum=%d\n",sum);
  getch();
}

感觉没必要多写几行吧·呵呵·

#include <stdio.h>
void main ()
{
  int a,b,sum=0;
  printf("please print the first number:");
  scanf("%d",&a);
  printf("print another number:");
  scanf("%d",&b);
  sum=a+b;
  printf("sum=%d\n",sum);
}