C++ ratio_less_equal()用法及代码示例

ratio_less_equal()是C++中的内置函数，可检查比率R1是否小于或等于比率R2。如果比率小于或等于比率2，则返回True；否则返回false。

用法:

template  ratio_less_equal

模板参数该函数接受两个要比较的模板参数ratio1和ratio2。

返回值：该函数返回一个布尔值，如果ratio1小于或等于ratio2，则返回true，否则返回false。

以下示例程序旨在说明上述函数：

示例1:

// C++ program to illustrate the 
// ratio_less_equal function 
// when both the ratios are equal 
#include <iostream> 
#include <ratio> 
using namespace std; 
int main() 
{ 
    typedef ratio<3, 9> ratio1; 
    typedef ratio<1, 3> ratio2; 
  
    // check if R1<=R2 
    if (ratio_less_equal<ratio1, ratio2>::value) 
        cout << "3/9 is less than or equal to 1/3"; 
    else
        cout << "3/9 is greater than 1/3"; 
  
    return 0; 
}

输出：

3/9 is less than or equal to 1/3

示例2:

// C++ program to illustrate the 
// ratio_less_equal function 
// to show less than 
#include <iostream> 
#include <ratio> 
using namespace std; 
int main() 
{ 
    typedef ratio<1, 3> ratio1; 
    typedef ratio<1, 2> ratio2; 
  
    // check if R1<=R2 
    if (ratio_less_equal<ratio1, ratio2>::value) 
        cout << "1/3 is less than or equal to 1/2"; 
    else
        cout << "1/3 is greater than 1/2"; 
  
    return 0; 
}

输出：

1/3 is less than or equal to 1/2

示例3:

// C++ program to illustrate the 
// ratio_less_equal function 
// to show when greater than 
#include <iostream> 
#include <ratio> 
using namespace std; 
int main() 
{ 
    typedef ratio<1, 8> ratio1; 
    typedef ratio<1, 10> ratio2; 
  
    // check if R1<=R2 
    if (ratio_less_equal<ratio1, ratio2>::value) 
        cout << "1/8 is less than or equal to 1/10"; 
    else
        cout << "1/8 is greater than 1/10"; 
  
    return 0; 
}

输出：

1/8 is greater than 1/10

相关用法

注：本文由纯净天空筛选整理自Twinkl Bajaj大神的英文原创作品 ratio_less_equal() function in C++。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。