為什么輸出是錯誤的答案?
#include?<stdio.h>
int?main()
{
????
????int?sum=0;
????int?i=1;
????int?flag=1;
????for(i=1;i<=100;i++);
????{
????????sum+=i*flag;
???? flag*=-1;
????}
????printf("sum=%d\n",sum);
????return?0;
}
劉大鏟子
2017-12-05
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2017-12-06
? ??for(i=1;i<=100;i++);
for語句后面不應有分號呀?。?！