while语句

#include <stdio.h>
void main()
{
int fahr, celsius;
int lower, upper, step;
lower = 0;
upper = 300;
step = 20;
fahr = lower;
printf("F\tC\n\n");
while (fahr <= upper){
celsius = 5 * (fahr - 32) / 9;
printf("%d\t%d\n", fahr, celsius);
fahr = fahr + step;
getchar();
}
}

第一版int重定义error false

fahr celsius位置颠倒

\t制表符缺少