<分区>
我是 C++ 的新手，我编写了我的第一个“真正的”程序(一个简单的四运算计算器)。当我编译它时，我得到了 12 个编译器错误。我能够解决一些(缺少分号等)，但其中 7 个拒绝消失。错误和我的代码在这里:
错误:
15 error: 'cout' was not declared in this scope
15 error: 'endl' was not declared in this scope
21 error: 'GetNumber' was not declared in this scope
24 error: 'GetOperator' was not declared in this scope
29 error: 'nAnswer' was not declared in this scope
33 error: 'AskContinue' was not declared in this scope
35 error: 'bContinue' was not declared in this scope
main.cpp
//Four-operation calculator
//© Olli Utriainen 2013
#include <iostream>
//Header with functions GetNumber(), GetOperator() and AskContinue()
#include "calculator.h"
using namespace std;
int main()
{
//Main loop's condition
bool bContinue = false;
cout << "Welcome to Olli's calculator!" << endl << endl;
//Main loop
do
{
cout << "Give first number" << endl;
int nNumber1 = GetNumber();
cout << "Give operator (+,-,*,/)" << endl;
char cOperator = GetOperator();
cout << "Give second number" << endl;
int nNumber2 = GetNumber();
nAnswer = nNumber1 + nNumber2;
cout << nNumber1 << " " << cOperator << " " <<
nNumber2 << " = " << nAnswer << endl;
bContinue = AskContinue();
} while (bcontinue);
return 0;
}
标题.h
//Headers for the calculator
//© Olli Utriainen 2013
#ifndef CALCULATOR_H_INCLUDED
#define CALCULATOR_H_INCLUDED
//Function for inputting numbers
int GetNumber()
//Function for inputting a mathematical operator (+,-,*,/)
char GetOperator()
//Function for asking Continue Yes/No
bool AskContinue()
#endif // CALCULATOR_H_INCLUDED
函数.cpp
//Functions for the calculator
//© Olli Utriainen 2013
#include <iostream>
using namespace std;
//Function for inputting numbers
int GetNumber()
{
int nNumber
cin >> nNumber;
return nNumber
}
//Function for inputting a mathematical operator (+,-,*,/)
int GetOperator()
{
char cOperator
bool bValidOperator = false;
//Do-while loop for checking if given operator
//is valid (+,-,*,/). If invalid, bValidOperator
//is changed to false ->loop will break and the
//given operator is returned
do
{
cin >> cOperator;
if (cOperator == '+' || '-' || '*' || '/')
{
bValidOperator = true;
}
else
{
bValidOperator = false;
cout << "Invalid operator" << endl;
}
} while (!bValidOperator)
return cOperator;
}
//Function for asking Continue Yes/No
bool AskContinue()
{
cout << "New calculation? Y/N" << endl;
bool bContinue = false;
if (cin >> 'Y' || 'y')
{
bContinue = true;
}
if (cin >> 'N' || 'n')
{
bContinue = false;
}
return bcontinue;
}