Justin's Words

第一个 C++ 程序

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实际上是来自 Learn Cpp.Com 的 o(^▽^)o

io.cpp

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#include <iostream>

double readNumber()
{
    using namespace std;
    double nInput;
    cout << "Enter a number: ";
        cin >> nInput;
    return nInput;
}

void writeAnswer(double answer)
{
    using namespace std;
    cout << "The answer is " << answer << endl;
}

io.h

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#ifndef IO_H
#define IO_H

double readNumber();
void writeAnswer(double answer);

#endif

main.cpp

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#include <iostream>
#include "io.h"

int main()
{
    using namespace std;
    double nInput1 = readNumber();
    double nInput2 = readNumber();
    writeAnswer(nInput1 + nInput2);
    system("pause");
    return 0;
}