Question

首次尝试在不使用Visual Studio的情况下编译某些代码。安装mingw并设置环境路径变量。然后尝试编译此代码：

#include <iostream>
#include <vector>

int main() {
typedef std::vector<int> Container;
typedef std::vector<int>size_type size;
typedef std::vector<int>iterator iter;

Container container; 

for (size i = 0; i != 1000000; ++i) {
container.push_back(i);
}

for (iter i = container.begin(); i != container.end(); ++i) {
std::cout << *i << " " << std::endl;
}

system("PAUSE");
return 0;
}

打开cmd shell，转到单个源文件的目录并输入：

g++ main.cpp

但是我得到了很多错误信息如下：

main.cpp: In function 'int main()':
main.cpp:6:35: error: expected initializer before 'size'
main.cpp:7:34: error: expected initializer before 'iter'
main.cpp:11:6: error: 'size' was not declared in this scope
main.cpp:11:11: error: expected ';' before 'i'
main.cpp:11:18: error: 'i' was not declared in this scope
main.cpp:15:6: error: 'iter' was not declared in this scope
main.cpp:15:11: error: expected ';' before 'i'
main.cpp:15:34: error: 'i' was not declared in this scope
main.cpp:19:15: error: 'system' was not declared in this scope

我错过了一些非常明显的东西吗？感谢。

Answer 1

typedef std::vector<int>size_type size;
typedef std::vector<int>iterator iter;

把它变成：

typedef std::vector<int>::size_type size;
typedef std::vector<int>::iterator iter;

Answer 2

你在vector定义和size_type之间缺少::运算符（以及它之后的迭代器）。

Answer 3

typedef std::vector<int>::size_type应为typedef std::vector<int>::size_type size;等。

mingw编译器错误

3 个答案: