解决

想必大家都遇到过这种报错
这是为什么呢？

#include<iostream>
using namespace std;
int main()
{int sum=0;for(i=0;i<=10;i++)sum++;cout<<sum;return 0;
}

这个程序就会报错[Error] ‘i’ was not declared in this scope
因为for循环变量’i’并没有定义才会导致这样
这其中的’i’可以换成任何变量名，比如’x’,‘j’,什么的
下次遇到这种错误就知道该怎么办了吧！

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解决[Error] ‘i‘ was not declared in this scope

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