C++ Cin未产生所需结果
我正在尝试设置一个简单的航班预订系统程序,但我的第二个cin代码在运行该程序时不需要输入。与最初的cin不同,cin最初需要您的名字。程序只运行并返回0。我是C++初学者,我知道这是一个简单的解决方案,所以请理解。感谢您的指导,我们将不胜感激C++ Cin未产生所需结果,c++,C++,我正在尝试设置一个简单的航班预订系统程序,但我的第二个cin代码在运行该程序时不需要输入。与最初的cin不同,cin最初需要您的名字。程序只运行并返回0。我是C++初学者,我知道这是一个简单的解决方案,所以请理解。感谢您的指导,我们将不胜感激 #include <iostream> #include <sstream> using namespace std; int main() { int name; int Seatnumber; int
#include <iostream>
#include <sstream>
using namespace std;
int main()
{
int name;
int Seatnumber;
int optionnumber = 1-5 ;
std::string out_string;
std::stringstream ss;
ss << optionnumber;
out_string = ss.str();
cout << "Welcome to the COS1511 Flight Booking System" "\n" << endl;
cout << "Enter full name : " << endl;
cin >> name ; "\n";
cout << "\n" "The Available travel times for flights are:" << endl;
cout << " Depart Arrive" << endl;
cout << "1. 7.00 9.30" << endl;
cout << "2. 9.00 11.30" << endl;
cout << "3. 11.00 13.30" << endl;
cout << "4. 13.00 15.30" << endl;
cout << "5. 15.00 17.30" << endl;
cout << "Choose the time by entering the option number from the displayed list : " << endl;
cin >> optionnumber ;
if (optionnumber == 1-5){
cout << "\n" "The available seats for are as follows " << endl;
}
else
cout << "Incorrect option! Please Choose from 1-5 " << endl;
cout << "First Class(1920)" << endl;
cout << "|A1||A2||A3|----|A4||A5||A6|" << endl;
cout << "|B1||B2||B3|----|B4||B5||B6|" << endl;
cout << "|C1||C2||C3|----|C4||C5||C6|" << endl;
cout << "|D1||D2||D3|----|D4||D5||D6|" << endl;
cout << "| Economy Class(1600)" << endl;
cout << "|E1||E2||E3|----|E4||E5||E6|" << endl;
cout << "|F1||F2||F3|----|F4||F5||F6|" << endl;
cout << "|G1||G2||G3|----|G4||G5||G6|" << endl;
cout << "|H1||H2||H3|----|H4||H5||H6|" << endl;
cout << "|I1||I2|" << endl;
cout << "Please Key in a seat number to choose a seat(eg: A2)" << endl;
cin >> Seatnumber;
}
#包括
#包括
使用名称空间std;
int main()
{
int名称;
国际座位号;
int optionnumber=1-5;
std::string out_string;
std::stringstream-ss;
ss警告
做
及
做
但是您希望如果((optionnumber>=1)和&(optionnumber>name
不允许它包含由空格分隔的多个名称,则可以使用组合名称getline如果(optionnumber==1-5)
与您的期望不符,请参阅我的答案我强烈建议使用而不是std::cin>>任何;
进行面向行的输入。我想我的答案解决了您的问题,但事实并非如此?是的,我是个白痴。我将名称声明为整数。我经常花数小时寻找像这样愚蠢的错误。谢谢您的帮助lp它工作得很好。@yogi欢迎你,别忘了接受我的回答来解决问题()
int optionnumber = 1-5 ;
int optionnumber = -4 ;
if (optionnumber == 1-5){
if (optionnumber == -4){
cin >> name ; "\n";
#include <iostream>
#include <string>
using namespace std;
int main()
{
string name;
string Seatnumber;
int optionnumber;
cout << "Welcome to the COS1511 Flight Booking System" "\n" << endl;
cout << "Enter full name : " << endl;
if (!(cin >> name))
// EOF (input from a file)
return -1;
cout << "\n" "The Available travel times for flights are:" << endl;
cout << " Depart Arrive" << endl;
cout << "1. 7.00 9.30" << endl;
cout << "2. 9.00 11.30" << endl;
cout << "3. 11.00 13.30" << endl;
cout << "4. 13.00 15.30" << endl;
cout << "5. 15.00 17.30" << endl;
cout << "Choose the time by entering the option number from the displayed list : " << endl;
for (;;) {
if (!(cin >> optionnumber)) {
// not an int
cin.clear(); // clear error
string s;
// flush invalid input
if (!(cin >> s))
// EOF (input from a file)
return -1;
}
else if ((optionnumber >= 1) && (optionnumber <= 5))
// valid choice
break;
cout << "Incorrect option! Please Choose from 1-5 " << endl;
}
cout << "\n" "The available seats for are as follows " << endl;
cout << "First Class(1920)" << endl;
cout << "|A1||A2||A3|----|A4||A5||A6|" << endl;
cout << "|B1||B2||B3|----|B4||B5||B6|" << endl;
cout << "|C1||C2||C3|----|C4||C5||C6|" << endl;
cout << "|D1||D2||D3|----|D4||D5||D6|" << endl;
cout << "| Economy Class(1600)" << endl;
cout << "|E1||E2||E3|----|E4||E5||E6|" << endl;
cout << "|F1||F2||F3|----|F4||F5||F6|" << endl;
cout << "|G1||G2||G3|----|G4||G5||G6|" << endl;
cout << "|H1||H2||H3|----|H4||H5||H6|" << endl;
cout << "|I1||I2|" << endl;
cout << "Please Key in a seat number to choose a seat(eg: A2)" << endl;
cin >> Seatnumber;
return 0;
}
pi@raspberrypi:/tmp $ g++ -pedantic -Wextra -Wall cc.cc
pi@raspberrypi:/tmp $ ./a.out
Welcome to the COS1511 Flight Booking System
Enter full name :
bruno
The Available travel times for flights are:
Depart Arrive
1. 7.00 9.30
2. 9.00 11.30
3. 11.00 13.30
4. 13.00 15.30
5. 15.00 17.30
Choose the time by entering the option number from the displayed list :
aze
Incorrect option! Please Choose from 1-5
7
Incorrect option! Please Choose from 1-5
2
The available seats for are as follows
First Class(1920)
|A1||A2||A3|----|A4||A5||A6|
|B1||B2||B3|----|B4||B5||B6|
|C1||C2||C3|----|C4||C5||C6|
|D1||D2||D3|----|D4||D5||D6|
| Economy Class(1600)
|E1||E2||E3|----|E4||E5||E6|
|F1||F2||F3|----|F4||F5||F6|
|G1||G2||G3|----|G4||G5||G6|
|H1||H2||H3|----|H4||H5||H6|
|I1||I2|
Please Key in a seat number to choose a seat(eg: A2)
qsd
pi@raspberrypi:/tmp $