运行此代码时，Dev C ++不断崩溃。 我不知道为什么

Question

I do not know whats going on. The program seemed to work fine on visual studio. Maybe I got something wrong and I cant spot it.. Please someone help me out with this one.

#include <iostream>
#include<string>
#include<cstdlib>

using namespace std;
class Aokiji
{
private:
    string name1;
    string name2;
public:
    string setName(string x)
    {
        name1=x;
    }
    string getName()
    {
        return name1;
    }
};

int main()
{
    Aokiji Grapes;
    Grapes.setName("I got it!");
    cout<< Grapes.getName()<< endl;
    system("pause");
}

Answer 1

Your setName() function doesn't return anything, but it's supposed to return a std::string. You need to return a value, or make the setName() function void (which is probably what it should be)

Answer 2

As was pointed at by PaulMacKenzie, the problem is the missing return statement. This is the reason why using C++, one should always use the -Werror=return-type flag to ensure that functions do not miss return statements.

I'm amazed C++ allows that, actually. The only case I think where it is legitimate that a function could miss a return statement is if it is supposed to return something, but instead it throws an exception and therefore does not return. But that's a very narrow use case, and adding a dummy return statement in that case does not cost anything.

Answer 3

Replace setName() method in your code by:

 void setName(string x) { name1 = x; } 

And you need return 0; in int main() .