1-3

printfの使い方。man printf。

[5623]% cat 1-3.c |c2utf  
#include <stdio.h>

/*
 * fahr=0,20,・・・300に対して、華氏-摂氏温度対応表を作成
 **/
main(){
        float fahr, celsius;
        int lower, upper, step;

        lower = 0;
        upper = 300;
        step = 20;

        fahr = lower;
        printf("%5s %8s\n", "fahr", "celsius");
        while(fahr <= upper){
                celsius = (5.0/9.0) * (fahr - 32.0);
                printf("%5.0f %8.1f\n", fahr, celsius);
                fahr = fahr + step;
        }
}

[ERROR:127]% ./1-3         
 fahr  celsius
    0    -17.8
   20     -6.7
   40      4.4
   60     15.6
   80     26.7
  100     37.8
  120     48.9
  140     60.0
  160     71.1
  180     82.2
  200     93.3
  220    104.4
  240    115.6
  260    126.7
  280    137.8
  300    148.9