大家看看这段简单的c哪里有错误了?谢谢啦!

@Ta 2012-11-07 3401点击
#include<stdio.h>
main()
{        int a,b;
          scanf("%d%d",&a,&b);
          a=a+b;
          b=a-b;
          a=a-b;
          printf("%d%d",a,b);
}
        
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