Question

现在我们将使用GNU C ++编译器编译该文件。我们用g++调用编译器。因此发出命令g++ Lab4.cpp。现在做一个ls你会得到什么？

当我发出这个命令时，我明白了。

/usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status

我做错了什么？

我在OS X中使用终端。

这是我教授的代码

#include <iostream>
using namespace std;

/*Start of Program*/
/*Control*/
int main ()
{
    /*Variable Definition*/
    int iNum1;  //names the storage area for user entered value
    int iNum2;  //names the storage area for the second user entered value
    int iResult;    //names the storage area for a computed value

    /*Screen Output is done with a cout*/
    cout << "Hello World!" << endl;
    cout << "My name is Burak Ersoy, I am learning to program in C++" << endl;

    /*Read*/
    cout << "Enter your 1st number: ";  //prompts user to enter a number
    cin >> iNum1;   //stores the user entered value in iNum1
    cout << "The number you entered is " << iNum1 << endl; //shows user what they entered

    cout << "Enter your 2nd number: ";  //asks user for another value
    cin >> iNum2;   //stores the second user entered value in iNum2
    cout << "The second number you entered is " << iNum2 << endl;

    /*Calc*/
    iResult = iNum1 / iNum2;    //computes division using iNum1 and iNum2

    /*Print*/
    cout << "When I divide " << iNum1 << " by " << iNum2 <<
        " the result is " << iResult << " with a remainder of "
        << iNum1 % iNum2 << endl;
    /*Outputs the entire process and result of the computation to screen*/

    return 0;
}

Answer 1

听起来你正在编译没有定义main的代码。您需要调整代码（可能是拼写错误，或者忘了定义代码），或者将代码编译成一个不是可执行文件的对象文件（在您的级别，即＆＃39;不太可能是你想要的。）

这是一个最小的C / C ++程序（我没有声称它符合每个规范）以及编译和运行它时会发生什么：

$ echo 'int main(){}' > foo.cpp
$ g++ foo.cpp -ofoo
$ ./foo
$ echo $?
0

试图在我的学生服务器上为学校编译这个C ++文件

1 个答案: