记事本写C++，开发人员命令运行

1.创建 hello.cpp

2.输入

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#include <stdio.h>

int main()
{

 int a;
 char c;

 printf("hello word!");
 scanf("%s",&c);
 printf("输入了：%s",&c);
 scanf("");
 
 return 0;
}

----------------------------

 scanf() 已经被  scanf_s() 代替，改为scanf_s()

----------------------------

#include <stdio.h>

int main()
{
 int a;
 char d[20];
 printf("hello word！输入不得大于20位字符");
 scanf_s("%s", &d, 20);
 printf("输入了：%s",&d);
 scanf_s("");
 
 return 0;
}

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3.开始-Visual Studio Tools-VS2019 开发人员命令提示

4.cd hello.cpp在的文件夹

5.cl hello.cpp 

6.运行效果

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两数相加

#include<stdio.h>

int main()
{
 int firstNumber, secondNumber, sumofTwoNumbers;
 printf_s("请输入两个整数");
 scanf_s("%d %d", &firstNumber, &secondNumber);
 sumofTwoNumbers = firstNumber + secondNumber;
 printf_s("%d+%d=%d", firstNumber, secondNumber, sumofTwoNumbers);
 scanf_s("");
}