易百教程

#include <stdio.h>

#define ADJUST 7.31              // one kind of symbolic constant

int main(void){
    const double SCALE = 0.333;  // another kind of symbolic constant
    double shoe, foot;
    shoe = 3.0;
    while (shoe < 18.5) {                        
        foot = SCALE * shoe + ADJUST;
        printf("%10.1f %15.2f inches\n", shoe, foot);
        shoe = shoe + 1.0;
    }                   
    printf("done.\n");

    return 0;
}