balance2.c

来自「The art and science of c_source code!」· C语言 代码 · 共 35 行

/*
 * File: balance2.c
 * ----------------
 * This file contains a buggy second attempt at a program to
 * balance a checkbook.
 */

#include <stdio.h>
#include "genlib.h"
#include "simpio.h"

main()
{
    double entry, balance;

    printf("This program helps you balance your checkbook.\n");
    printf("Enter each check and deposit during the month.\n");
    printf("To indicate a check, use a minus sign.\n");
    printf("Signal the end of the month with a 0 value.\n");
    printf("Enter the initial balance: ");
    balance = GetReal();
    while (TRUE) {
        printf("Enter check (-) or deposit: ");
        entry = GetReal();
        if (entry == 0) break;
        balance += entry;
        if (balance < 0) {
            printf("This check bounces.  $10 fee deducted.\n");
            balance -= 10;
        }
        printf("Current balance = %g\n", balance);
    }
    printf("Final balance = %g\n", balance);
}