C++ 算术运算符

尝试下面的示例来理解 C++ 中所有可用的算术运算符。

复制并粘贴下面的 C++ 程序到 test.cpp 文件中，然后编译和运行该程序。

#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;
}

当上述代码被编译并执行时，它产生以下结果−

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