C语言库ceil()函数

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

int main () {
   float val1, val2, val3, val4;

   val1 = 1.6;
   val2 = 1.2;
   val3 = 2.8;
   val4 = 2.3;

   printf ("value1 = %.1lf/n", ceil(val1));
   printf ("value2 = %.1lf/n", ceil(val2));
   printf ("value3 = %.1lf/n", ceil(val3));
   printf ("value4 = %.1lf/n", ceil(val4));

   return(0);
}