C++ 关系运算符

尝试以下示例以了解C++中可用的所有关系运算符。

将下面的C++程序复制粘贴到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 ;   if( a == b ) {      cout << "Line 1 - a is equal to b" << endl ;   } else {      cout << "Line 1 - a is not equal to b" << endl ;   }   if( a < b ) {      cout << "Line 2 - a is less than b" << endl ;   } else {      cout << "Line 2 - a is not less than b" << endl ;   }   if( a > b ) {      cout << "Line 3 - a is greater than b" << endl ;   } else {      cout << "Line 3 - a is not greater than b" << endl ;   }   /* Let's change the values of a and b */   a = 5;   b = 20;   if( a <= b ) {      cout << "Line 4 - a is either less than \ or equal to  b" << endl ;   }   if( b >= a ) {      cout << "Line 5 - b is either greater than \ or equal to b" << endl ;   }   return 0;}

当以上代码被编译和执行时，它会产生以下结果 –

Line 1 - a is not equal to bLine 2 - a is not less than bLine 3 - a is greater than bLine 4 - a is either less than or euqal to  bLine 5 - b is either greater than or equal to b