输入小时转化成小时分钟秒，我哪里错了？

#include<stdio.h> 
int main()
{
    float input_number ;
    int hours,minutes,seconds;
    printf("How many hours:");
    scanf("%lf",&input_number);
    hours=(int)input_number;
    minutes=(int)((input_number-hours)*60);
    seconds=((input_number-hours)*60-minutes)*60;
    printf("%dhours%dminutes%dseconds",hours,minutes,seconds);
    return 0;
    
}

scanf("%f",&input_number);

输入float用%f