刚开始学习c++并尝试制作一个自动订购系统,但是在尝试继续运行之前尝试运行时,我遇到了这个问题:
#include <iostream>
using namespace std;
char acoustic, fender, hartwood, electric, gibson, ibanez, drums, pearl,
roland, piano, casio;
char rolandpi, equip, string, headphone, amp, mixer, micro, tuner, pick,
music, Yes, No;
int pay1 = 0, pay2 = 0;
int main()
{
cout << "Welcome to the Music Shop" << endl <<endl;
cout << "a. Acoustic Guitar" << endl;
cout << "a.1 Fender Acoustic Guitar - P6,900.00" << endl;
cout << "a.2 Hartwood Acoustic Guitar - P6,300.00" << endl <<endl;
cout << "b. Electric Guitar" << endl;
cout << "b.1 Gibson Electric Guitar -P8,500.00" << endl;
cout << "b.2 Ibanez Electric Guitar -P25,000.00" << endl <<endl;
cout << "c. Drums" << endl;
cout << "c.1 Pearl Drum Kits -P27,000.00" << endl;
cout << "c.2 Roland Electronic Drums -P24,000.00" << endl <<endl;
cout << "d. Piano" << endl;
cout << "d.1 Casio Digital Piano -P19,000.00" << endl;
cout << "d.2 Roland Piano -P120,000.00" << endl <<endl;
cout << "e. Music Equipments" << endl;
cout << "e.1 Guitar String -P113.00" << endl;
cout << "e.2 Headphones -P1,600.00" << endl;
cout << "e.3 Amplifier -P2,800.00" << endl;
cout << "e.4 Digital Mixer -P4,750.00" << endl;
cout << "e.4 Vocal Microphone -P860.00" << endl;
cout << "e.5 Guitar Tuner -P537.00" << endl;
cout << "e.6 Guitar Pick -P360.00" << endl <<endl;
cout << "Choose the music instrument or equipment you want to buy: ";
cin >> music;
switch (music)
{
case 'a':
cout<< "Acoustic Guitar" << endl;
cout<< "1. Fender Acoustic Guitar - P6,900.00" << endl;
cout<< "2. Hartwood Acoustic Guitar - P6,300.00" << endl <<endl;
cout<<"Choose from the available Acoustic Guitars:";
cin>>acoustic;
if (acoustic == 1){
cout<<"Enter your payment:";
cin>>pay1;
if (pay1=6900){
cout<<"You have succesfully purchased Fender Acoustic Guitar"<<endl;
}
else if (pay1>6900){
pay1 -= 6900;
cout<<"Your change is:"<<pay1<<endl;
}
else (pay1<6900);
{
cout<<"You do not have enough money"<<endl;
}
}
else if (acoustic == 2){
cout<<"Enter your payment:";
cin>>pay1;
if (pay1=6300){
cout<<"You have succesfully purchased Fender Acoustic Guitar"<<endl;
}
else if (pay1>6300){
pay1 -= 6300;
cout<<"Your change is:"<<pay1<<endl;
}
else (pay1<6300);
{
cout<<"You do not have enough money"<<endl;
}
}
else {
cout<<"Invalid"<<endl;
}
}
}
我已经检查了
if else
语句,找不到错误之处。从“从可用的原声吉他中选择”输入
1
或2
后,它将继续进行到“无效”。 最佳答案
您在此处阅读了char
:
cout << "Choose from the available Acoustic Guitars:";
cin >> acoustic;
但是之后,您将其与
int
进行比较:if (acoustic == 1) {
相反,它应该是:
if (acoustic == '1') {
还有这个:
if (pay1 = 6900) {
应该:
if (pay1 == 6900) {
因为否则
pay1 = 6900
会将pay1
设置为6900
并返回6900
,而无论输入什么内容,您都会得到不正确的输出,该true
隐式转换为(pay1 < 6900)
。也是这一行:
else (pay1 < 6900);
需要更改为
else if (pay1 < 6900)
因为否则
if
不是(pay1 < 6900);
语句的条件,而是else
在"You do not have enough money"
情况下发生的情况(仅计算 bool(boolean) 值并将其丢弃),导致始终打印以下ojit_code消息。