1 #include <stdio.h> 2 #include <math.h> 3 4 int main(){ 5 double number=123.54; 6 double down,up; 7 down=floor(number); 8 up=ceil(number); 9 printf("original_number%10.2lf ",number); 10 printf("number_rounded_down%10.2lf ",down); 11 printf("number_rounded_up%10.2lf ",up); 12 return 0; 13 } 14 运行结果: 15 original_number 123.54 16 number_rounded_down123.00 17 number_rounded_up124.00
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