【C++学习笔记】for循环中的复合语句（语句块）

1、C++for语句的格式循环体要求必须要是一条语句，使用两个花括号则可以构成一条复合语句（代码块）

如果在语句块中定义一个新的变量，则仅当该程序执行该语句块中的语句时，该变量才存在。执行完语句块后，变量将被释放。

#include <iostream>int main(){using namespace std;cout << "The Amazing Accounto will sum and average ";cout << "five numbers for you.\n";cout << "Please enter five values:\n";double number;double sum = 0.0;for (int i = 1;i <=5;i++){cout << "Value " << i << ": ";cin >> number;sum += number;}cout << "Five exquisite choices indeed! ";cout << "They sum to " << sum << endl;cout << "and average to " << sum / 5 << ".\n";cout << "The Amazing Accounto bids you adieu!\n";return 0;}

结果如下：