错误：未声明cout，这给了我编译问题 [英] error: cout was not declared and is giving me compiling problems

问题描述

#include <ostream>
#include <string>

using namespace std;
int main()
{
char c = 'x';
int i1 = c;
int i2 = 'x';
char c2 = i1;
cout << c << ' << i1 << ' << c2 << '\n';
}

我一直在出错：此范围内未声明 cout。
警告：字符常量的类型太长（默认情况下启用）

I keep getting error: 'cout' was not declared in this scope. warning: character constant too long for its type (enabled by default)

推荐答案

您需要

#include <iostream>

在这里定义 std :: cout 。 （而且您不需要 #include< ostream> 。）

That's where std::cout is defined. (And you don't need #include <ostream>.)

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