funtc101b.dat

指令字典2005里面可以方便的查找一些函数

#include <math.h>
#include <stdio.h>
int main(void)
{
    double number = 123.54;
    double down, up;
    down = floor(number);
    up = ceil(number);
    printf("original number     %5.2lf
", number);
    printf("number rounded down %5.2lf
", down);
    printf("number rounded up   %5.2lf
", up);
    return 0;
}