C++学习笔记

#include <iostream>//inputstream  outputstream合并缩写，输入输出流的头文件，标准库设计者提前写好的类和类型、宏
#include <Windows.h>
#include<String>
using namespace std;
#pragma region 申明函数
//申明函数
void funcout();
void funcout(string str);
int getMax(int a, int b);
int getMax(int *arr, int arrCount);
int addNum(int number);
#pragma endregion

int main(void)//主函数
{

    int arr[7] = { 2,5,7,8,5,4,7 };
    try
    {
#pragma region test1--输入输出流
        int age;
        string str;
        cin >> str >> age;
        cout << str << "成立" << age << "年了！" << endl;//endl 是endline缩写，换行作用，可用\n代替
        cout << str << "成立" << age << "年了！\n";
#pragma endregion

#pragma region test2--函数调用
        funcout();
        funcout("有参数方法");

        cout << "较大值为：" << getMax(arr[0], arr[1]) << endl;
        cout << "最大值为：" << getMax(arr, 7) << endl;
        cout << "最大值为：" << addNum(7) << endl;
#pragma endregion
    }
    catch (const std::exception& ex)
    {
        throw ex;
    }
    system("pause");//暂停
    return 0;
}

#pragma region test3--函数

void funcout()
{
    cout << "www.c++学习网" << endl;
}
void funcout(string str)
{
    cout << "www.c++学习网" << str << endl;
}
int getMax(int a, int b)
{
    return (a > b) ? a : b;
}
int getMax(int *arr, int  arrCount)
{
    int max = arr[0];
    for (int i = 1; i < arrCount; i++)
    {
        max = (arr[i] > max) ? arr[i] : max;
    }
    return max;
}
int addNum(int number)
{
    int sum=0;
    for (int i = 1; i <= number; i++)
    {
        sum += i;
    }
    return sum;
}
#pragma endregion