error: `cout' was not declared in this scope

原因：
C++ 1998 要求cout and endl被调用使用‘std::cout‘和‘std::endl‘格式,或using namespace std;

修改后：
#include<iostream>

std::cout << "Hello World!" << std::endl;

或者

#include<iostream>
using namespace std;

error: `cout' was not declared in this scope

原文地址：https://www.cnblogs.com/ProtoDrive/p/9775858.html

时间： 2024-10-10 01:15:01

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