任务1
- #include<stdio.h>
- #include<stdlib.h>
- #include<time.h>
- #define N 5
- #define N1 80
- #define N2 35
- int main(){
- int cnt;
- int random_major,random_no;
- cnt=0;
- while(cnt<N){
- random_major=rand()%2;
- if(random_major){
- random_no=rand()%N1+1;
- printf("20256343%04d\n",random_no);
- }
- else{
- random_no=rand()%N2+1;
- printf("20256136%04d\n",random_no);
- }
- cnt++;
- }
- system("pause");
- return 0;
- }
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问题1
会使第二次再购买饮料使的总价钱为第一次和第二次总价相加之和,使其购买总价计算错误
问题2
不再执行continue后面的语句,重新进行一次循环
任务3
- #include <stdio.h>
- #include<stdlib.h>
- int main() {
- int choice, quantity;
- float total_price = 0, amount_paid, change;
- while (1) {
- printf("\n自动饮料售卖机菜单:\n");
- printf("1. 可乐 - 3 元/瓶\n");
- printf("2. 雪碧 - 3 元/瓶\n");
- printf("3. 橙汁 - 5 元/瓶\n");
- printf("4. 矿泉水 - 2 元/瓶\n");
- printf("0. 退出购买流程\n");
- printf("请输入饮料编号: ");
- scanf("%d", &choice);
- if (choice == 0)
- break;
- if (choice < 1 || choice > 4) {
- printf("无效的饮料编号,请重新输入。\n");
- continue;
- }
- printf("请输入购买的数量: ");
- scanf("%d", &quantity);
- if (quantity < 0) {
- printf("购买数量不能为负数,请重新输入。\n");
- continue;
- }
- if(choice == 1 || choice == 2)
- total_price += 3 * quantity;
- else if(choice == 3)
- total_price += 5 * quantity;
- else
- total_price += 2 * quantity;
- printf("请投入金额: ");
- scanf("%f", &amount_paid);
- change = amount_paid - total_price;
- printf("本次购买总价: %.2f 元\n", total_price);
- printf("找零: %.2f 元\n", change);
- total_price = 0;
- }
- printf("感谢您的购买,欢迎下次光临!\n");
- system("pause");
- return 0;
- }
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任务4
[code]#include#include#define _CRT_SECURE_NO_WARNINGSint main(){ float x,max=0,min=20000,ans=0; printf("输入今日开销,直到输入-1终止:\n"); scanf("%f",&x); while(x>0){ ans=ans+x; if(x>max) max=x; if(x |