C++ 算术运算符

尝试以下示例以了解 C++ 中可用的所有算术运算符。

将以下 C++ 程序复制并粘贴到 test.cpp 文件中，并编译和运行此程序。

#include <iostream>
using namespace std;
 
main() {
   int a = 21;
   int b = 10;
   int c ;
 
   c = a + b;
   cout << "Line 1 - Value of c is :" << c << endl ;
   
   c = a - b;
   cout << "Line 2 - Value of c is  :" << c << endl 
   ;
   c = a * b;
   cout << "Line 3 - Value of c is :" << c << endl ;
   
   c = a / b;
   cout << "Line 4 - Value of c is  :" << c << endl ;
   
   c = a % b;
   cout << "Line 5 - Value of c is  :" << c << endl ;
   
   c = a++; 
   cout << "Line 6 - Value of c is :" << c << endl ;
   
   c = a--; 
   cout << "Line 7 - Value of c is  :" << c << endl ;
   
   return 0;
}

编译并执行上述代码时，会产生以下结果：

Line 1 - Value of c is :31
Line 2 - Value of c is  :11
Line 3 - Value of c is :210
Line 4 - Value of c is  :2
Line 5 - Value of c is  :1
Line 6 - Value of c is :21
Line 7 - Value of c is  :22