wenbao与取整函数

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

int main(){
    double number=123.54;
    double down,up;
    down=floor(number);
    up=ceil(number);
    printf("original_number%10.2lf
",number);
    printf("number_rounded_down%10.2lf
",down);
    printf("number_rounded_up%10.2lf
",up);
    return 0;
}
运行结果：
original_number　123.54
number_rounded_down123.00
number_rounded_up124.00

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