#include <stdio.h> int main(void) { //提供變量 cmd balance(余額) deposit(存款) withdraw(取款) //利用while做死循環 int cmd; float balance=0.0f, deposit, withdraw; printf("------【陳大純簡單的銀行存取款程序】請輸入如下數字命令-----\n"); printf("操作命令: 0:清空, 1:存款 2:取款 3:查看余額 4:退出程序 \n"); while(1){ printf("輸入操作命令:"); scanf("%d",&cmd); switch(cmd){ case 0: balance = 0.0f;break; case 1: printf("輸入要存款金額:\n"); scanf("%f",&deposit); balance = balance+deposit; break; case 2: printf("輸入要取款的金額:\n"); scanf("%f",&withdraw); balance = balance-withdraw; break; case 3: printf("當前存款余額:¥%.2f\n",balance); break; case 4: //退出主函數 結束運行 printf("------【已經退出程序】------\n"); return 0; default: printf("輸入命令錯誤;請重試!\n"); } } return 0; }