C++ remquo()用法及代碼示例

此函數用於返回其參數中提到的2個浮點數的餘數(模)，並且還存儲商對其傳遞的指針的商。計算出的商會四舍五入。

餘數=數字-rquot *十進製
其中rquot是：分子/分母的結果，四舍五入到最接近的整數值(中間情況四舍五入到偶數)。

用法:

long double remquo(long double a, long double b, int* q);
double remquo(double a, double b, int* q);
float remquo(float a, float b, int* q);

參數：

ab是分子和分母的值。 q是將在其中存儲商的指針。

返回：

它返回四舍五入到最接近的分子/分母的浮點餘數，並將商存儲在q中。

錯誤：

必須提供所有三個參數，否則將給調用“ remquo”的匹配函數帶來錯誤。
必須將第三個參數傳遞給指針，因為它存儲了商的地址，否則將給出錯誤“ remquo(double&，double&，int&)”

。

例子：

Input:remquo(12.5, 2.2, &q)
Output:-0.7 and q=6

說明：

Input:remquo(-12.5, 2.2, &q)
Output:0.7 and q=-6

＃代碼1

// CPP implementation of the above  
// function 
#include <cmath> 
#include <iostream> 
  
using namespace std; 
  
int main() 
{ 
    int q; 
    double a = 12.5, b = 2.2; 
  
    // it will return remainder  
    // and stores quotient in q 
    double answer = remquo(a, b, &q); 
      
    cout << "Remainder of " << a << "/" 
         << b << " is " << answer << endl; 
      
    cout << "Quotient of " << a << "/" 
         << b << " is " << q << endl 
         << endl; 
  
    a = -12.5; 
      
    // it will return remainder  
    // and stores quotient in q 
    answer = remquo(a, b, &q); 
      
    cout << "Remainder of " << a << "/" << b  
         << " is " << answer << endl; 
      
    cout << "Quotient of " << a << "/" << b  
         << " is " << q << endl 
         << endl; 
  
    b = 0; 
      
    // it will return remainder 
    // and stores quotient in q 
    answer = remquo(a, b, &q); 
      
    cout << "Remainder of " << a << "/" << b  
         << " is " << answer << endl; 
      
    cout << "Quotient of " << a << "/" << b  
         << " is " << q << endl 
         << endl; 
  
    return 0; 
}

輸出：

Remainder of 12.5/2.2 is -0.7
Quotient of 12.5/2.2 is 6

Remainder of -12.5/2.2 is 0.7
Quotient of -12.5/2.2 is -6

Remainder of -12.5/0 is -nan
Quotient of -12.5/0 is -6

＃代碼2

// CPP implementation of the 
// above function 
#include <cmath> 
#include <iostream> 
  
using namespace std; 
  
int main() 
{ 
    int q; 
    double a = 12.5; 
    int b = 2; 
  
    // it will return remainder 
    // and stores quotient in q 
    double answer = remquo(a, b, &q); 
      
    cout << "Remainder of " << a << "/" << b  
         << " is " << answer << endl; 
      
    cout << "Quotient of " << a << "/" << b  
         << " is " << q << endl 
         << endl; 
  
    return 0; 
}

輸出：

Remainder of 12.5/2 is 0.5
Quotient of 12.5/2 is 6

相關用法

C++ cin get()用法及代碼示例

注：本文由純淨天空篩選整理自pawan_asipu大神的英文原創作品 remquo() in C++。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。