c++ 快速入門

[html]
#include <iostream> 
int main() 
{ 
    std::cout << "Enter two numbers:"  << std::endl; 
        int v1,v2; 
        std::cin >> v1 >> v2; 
        std::cout << "The sum of " << v1 << " and " << v2 << " is " << v1 + v2 << std::endl; 
        return 0; 
} 

輸出：
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pateo@pateo-B86N53X:~/work/study$ g++ -o main main.cc 
pateo@pateo-B86N53X:~/work/study$ ls 
main  main.cc 
pateo@pateo-B86N53X:~/work/study$ ./main 
Enter two numbers: 
1 
2 
The sum of 1 and 2 is 3 
pateo@pateo-B86N53X:~/work/study$  

[html] 
pateo@pateo-B86N53X:~/work/study$ ./main 
Enter two numbers: 
4 6 
The sum of 4 and 6 is 10 
pateo@pateo-B86N53X:~/work/study$  

endl 說明：操作符，將它寫入輸出流時，具有輸出換行的效果，並刷新與設備相關聯的緩沖區，通過刷新緩沖區，用戶可立即看到寫入到流中的輸出

其他說明：c++ 也有前++和後++，相應的for循環等基礎語法是一樣的

[html] 
#include <iostream> 
int main() 
{ 
        int sum = 0, value; 
    while(std::cin >> value) 
        sum += value; 
        std::cout << "Sum is " << sum << std::endl; 
        return 0; 
} 

停止動作：兩次ctr+d
輸出：
[html]  www.2cto.com
pateo@pateo-B86N53X:~/work/study$ ./main 
1 2 3 Sum is 6 
pateo@pateo-B86N53X:~/work/study$