从C中的浮点数中提取小数部分

#include<stdio.h>
#include <math.h>

int main() {
    float num = 12.345;
    int int_part = (int)num;
    float frac_part = fmod(num, int_part);
    printf("Fractional part of %f is %f\n", num, frac_part);
    return 0;
}

Fractional part of 12.345000 is 0.345000