Getting Started with C ++

1. C ++ file suffix
   • .cc, .cxx, .cpp, .cp, .c
2. Through the command line compiler

1. 编写文件 prog1.cc
int main()
{
    return 0;
}

2. 执行命令:
CC prog1.cc
或者:
g++ -o prog1 prog1.cc

3. 运行生成的文件
    Linux 系统生成 a.out
    Windows 系统生成 prog1.exe
./a.out

4. 获取执行结果
echo $?

1. Input / output streams
   • iostream
     • istream: Input stream;
       • cin: Standard input stream;
     • ostream: The output stream;
       • cout: Standard output stream;
       • cerr: Printing error information for processing warning, error;
       • clog: Print General Information;

// 用户输入两个值,计算这两个值的和
#include <iostream>
/*
 * sum function:
 * Read two numbers and write their sum
 */
int main()
{
    // prompt user to enter two numbers
    std::cout << "Enter two numbers:" << std::endl;
    int v1 = 0, v2 = 0;
    std::cin >> v1 >> v2;
    std::cout << "The sum of " << v1 << " and " << v2
              << " is " << v1 + v2 << std::endl;
    return 0;
}

References:

• C ++ Primer