floor()函数fmod()函数是cmath标头的库函数,用于查找除法的余数,它接受两个数字(分子和分母),并返回四舍五入为零的分子/分母的浮点余数。
fmod()函数语法:
fmod(n, m);
参数: n,m –是用于计算除法余数的数字(分子,分母)。
返回值: double-返回double类型的值,该值是除法的浮点余数。
示例
Input: float n = 5.3; float m = 2; Function call: fmod(n,m); Output: 1.3
fmod()函数示例//示例 
// fmod()功能
#include <iostream>
#include <cmath>
using namespace std;
// main()部分
int main(){
    float n;
    float m;
    float result;
    
    //的值 
    //分子和分母
    cout<<"Enter the value of numerator  : ";
    cin>>n;
    cout<<"Enter the value of denominator: ";
    cin>>m;
    
    //找到余数
    result = fmod(n,m);
    cout<<"floating-point remainder of "<<n<<"/"<<m<<" is: ";
    cout<<result<<endl;
    return 0;
}输出结果
Enter the value of numerator: 5.3 Enter the value of denominator: 2 floating-point remainder of 5.3/2 is: 1.3 Second run: Enter the value of numerator: 18.5 Enter the value of denominator: 4.2 floating-point remainder of 18.5/4.2 is: 1.7 Third run: Enter the value of numerator: -36.23 Enter the value of denominator: 24.1 floating-point remainder of -36.23/24.1 is: -12.13 Fourth run: Enter the value of numerator: 36.23 Enter the value of denominator: -24.1 floating-point remainder of 36.23/-24.1 is: 12.13