a prob?

This is a discussion on a prob? within the C++ Programming forums, part of the General Programming Boards category; Code: #include<iostream> #include<conio.h> using std::cout; using std::cin; using std::endl; // function prototype double small(double,double); int main() { // declare varibales ...

  1. #1
    o0o
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    Unhappy a prob?

    Code:
    #include<iostream>
    #include<conio.h>
    using std::cout;
    using std::cin;
    using std::endl;
    // function prototype
    double small(double,double);  
    
    int main()
    {
        // declare varibales
        double num1,num2;   
        // read values
        cout<< "Enter two double values:\t";    
        cin>> num1 >> num2;
        // display result
        cout<< small(num1,num2);
    
    getch();
    }
    // define small()
    double small(double value1,double value2)
    {   
        // declare alias
        double minValue;
        // check smallest value
        double minValue=value1;
        if(value2<minValue)
        minValue=value2;
        return minValue;
    }
    It gives me parse errors before functions prototype.

    The same code when tries with an integer value gives correct output. What is wrong in this code?

  2. #2
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    You have a redefinition of minValue in your small function and your main doesn't return a value.
    "...the results are undefined, and we all know what "undefined" means: it means it works during development, it works during testing, and it blows up in your most important customers' faces." --Scott Meyers

  3. #3
    o0o
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    didn't get that/

  4. #4
    Senior Member joshdick's Avatar
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    Re: a prob?

    Code:
    #include<iostream>
    #include<conio.h>
    using std::cout;
    using std::cin;
    using std::endl;
    // function prototype
    double small(double,double);  
    
    int main()
    {
        // declare varibales
        double num1,num2;   
        // read values
        cout<< "Enter two double values:\t";    
        cin>> num1 >> num2;
        // display result
        cout<< small(num1,num2);
    
    getch();
        return 0; // I think recent standards say this is implicit, but why leave it to chance?
    }
    // define small()
    double small(double value1,double value2)
    {   
        // declare alias
        double minValue;
        // check smallest value
        /*double*/ minValue=value1; // You can only define a variable once
        if(value2<minValue)
        minValue=value2;
        return minValue;
    }
    FAQ

    "The computer programmer is a creator of universes for which he alone is responsible. Universes of virtually unlimited complexity can be created in the form of computer programs." -- Joseph Weizenbaum.

    "If you cannot grok the overall structure of a program while taking a shower, you are not ready to code it." -- Richard Pattis.

  5. #5
    o0o
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    got it now thanku/

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