What is Wrong?

Code:

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#include <iostream>
#include <string>
using namespace std;

int plus(const int& val1,const int& val2);
double plus(const double& val1,const double& val2);
string plus(const string& val1,const string& val2);

int main()
{
    int n = plus(3,4);    // error here
    double d = plus(3.2,4.2);
    string s = plus("he","llo");
    string s1 = "aaa";
    string s2 = "bbb";
    string s3 = plus(s1,s2);
   
    cout << "n = " << n;
        << "d = " << d;
        << "s = " << s;
        << "s1 = " << s1;
        << "s2 = " << s2;
        << "s3 = " << s3
        << endl
        << endl;
   
    system("PAUSE");
    return 0;
}

int plus(const int& val1,const int& val2)
{
    return val1 + val2
}

double plus(const double& val1,const double& val2)
{
    return val1 + val2
}

string plus(const string& val1,const string& val2)
{
    return val1 + val2
}

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It says 'use' on the line int n = plus(3,4); .I dunno why though. Is it my compiler's (Dev C++) problem once again? :(

You have semicolon issues. There are semicolons where none should be and none where semicolons should be. To be more specific:

Code:

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    cout << "n = " << n;
        << "d = " << d;
        << "s = " << s;
        << "s1 = " << s1;
        << "s2 = " << s2;
        << "s3 = " << s3
        << endl
        << endl;

---

A semicolon ends a statement, since the next << continues a statement, your compiler feels that continuing an ending is rather counterintuitive.

>return val1 + val2
A return statement should definitely be ended since the next token is a closing brace, and compilers don't like to see those in an expression for some reason.

Quote:

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Originally posted by Prelude
You have semicolon issues. There are semicolons where none should be and none where semicolons should be. To be more specific:

Code:

---

    cout << "n = " << n;
        << "d = " << d;
        << "s = " << s;
        << "s1 = " << s1;
        << "s2 = " << s2;
        << "s3 = " << s3
        << endl
        << endl;

---

A semicolon ends a statement, since the next << continues a statement, your compiler feels that continuing an ending is rather counterintuitive.

>return val1 + val2
A return statement should definitely be ended since the next token is a closing brace, and compilers don't like to see those in an expression for some reason.

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Ahh, thx. I just saw them too. But i still can't compile it....

>But i still can't compile it....
I suppose Dev-C++ doesn't like your use of the identifier plus. It conflicts with the STL function object of the same name.

Quote:

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Originally posted by Cris987
But i still can't compile it....

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You're going to have to be a lot more specific. What is your new error? On what line is it? What does you modified code now look like?

Help us to help you.

Quote:

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Originally posted by joshdick
You're going to have to be a lot more specific. What is your new error? On what line is it? What does you modified code now look like?

Help us to help you.

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It's the same error on the same line:

int n = plus(3,4);


the error is 'use'

Quote:

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Originally posted by Prelude
>But i still can't compile it....
I suppose Dev-C++ doesn't like your use of the identifier plus. It conflicts with the STL function object of the same name.

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You're right...I got it.