C库函数 ceil()

#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);

}