decimals to int?

This is a discussion on decimals to int? within the C++ Programming forums, part of the General Programming Boards category; my objective is to write a program that a. prompts the user to input 5 decimal numbers b.. prints the ...

  1. #1
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    decimals to int?

    my objective is to write a program that
    a. prompts the user to input 5 decimal numbers
    b.. prints the 5 decimal numbers
    c. converts each decimal number to the nearest integer
    d. adds the 5 integers
    e. Prints the sum and the average of the 5 integers

    this is what i have so far
    Code:
    // main
    #include <iostream>
    using namespace std;
    
    void extern input (double, double, double, double, double);
    
    void extern calculate (double num1, double num2, double num3, double num4, double num5);
    
    void extern output (double num1, double num2, double num3, double num4, double num5);
    
    int main()
    
    {
        // Declaration (data)
        double num1, num2, num3, num4, num5;
        
        
        // Logic (executable)
        
        input (num1, num2, num3, num4, num5);
        
        calculate ( num1, num2, num3, num4, num5);  
        
        output (num1, num2, num3, num4, num5);
                   
        system ("Pause");
        return 0;  
        
    }
    Code:
    // input
    #include <iostream>
    using namespace std;
    
    void input (/* out */ double num1, double num2, double num3, double num4, double num5)
    {
        cout << "Please enter a decimal: ";
    	cin >> num1;
    	cout << endl;
    	cout << "Please enter a decimal: ";
    	cin >> num2;
    	cout << endl;
    	cout << "Please enter a decimal: ";
    	cin >> num3;
    	cout << endl;
    	cout << "Please enter a decimal: ";
    	cin >> num4;
    	cout << endl;
    	cout << "Please enter a decimal: ";
    	cin >> num5;
        cout << endl;
        
    }
    Code:
    // calculate
    
       
       void calculate ( /* in */ double num1, double num2, double num3, double num4, double num5)
    {        
          // local declarations
    
        total, average;
        
     // executable
           
           total = (num1 + num2 + num3 + num4 + num5);
           average = (5 / total);
                
    }
    Code:
    // output
    
    #include <iostream>
    using namespace std;
    
    void output ( /* in */ int num1, int num2, int num3, int num4, int num5)
    
    {
    
         cout << " The Original Numbers Were: " << num1 << num2 << num3 << num4 << num5 << endl;
         
         cout << " The total is: " << total << endl;
         
         cout << " The Average is: " << average << endl;
         
         
    
    }
    any tips would be great im just really stuck and dont know really what to do

  2. #2
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    Does the program compile without errors and warnings?

    If not what are the error/warning messages, post the entire message.

    If you have no errors what is wrong with your program?

    What is your input?

    What is your output?

    What did you expect your output to be?

    Jim

  3. #3
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    this is the error i get when compileing
    Circular output <- output.o dependency dropped.
    Circular Input <- Input.o dependency dropped.
    Circular Calculate <- Calculate.o dependency dropped.
    F:\C++\project\dec to int\Makefile.win [Build Error] [Project1.exe] Error 1
    my input is the second piece of code and my output is the last

    and my objective is to write a program that
    a. prompts the user to input 5 decimal numbers
    b.. prints the 5 decimal numbers
    c. converts each decimal number to the nearest integer
    d. adds the 5 integers
    e. Prints the sum and the average of the 5 integers

  4. #4
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    What compiler are you using?

    Are the functions all in one file or in multiple files?

    Try to remove the extern from your function prototypes.

  5. #5
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    dev C++

    Yes they are in diffent files

    and what will that do?

  6. #6
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    Quote Originally Posted by nixxonn View Post
    dev C++

    Yes they are in diffent files

    and what will that do?
    Possibly fix your errors

    Circular output <- output.o dependency dropped.
    Circular Input <- Input.o dependency dropped.
    Circular Calculate <- Calculate.o dependency dropped.
    F:\C++\project\dec to int\Makefile.win [Build Error] [Project1.exe] Error 1
    Jim

  7. #7
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    didnt work, same error

  8. #8
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    Code:
    void input (/* out */ double num1, double num2, double num3, double num4, double num5)
    The comment "out" does nothing to make the variables output in C!
    I suggest learning how pointers are used to return values in C. Or pass by reference in C++
    I assume the same is true for C++.

    Tim S.

  9. #9
    Algorithm Dissector iMalc's Avatar
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    I've seen other ways people get a simple average calculation wrong, but this is new:
    Code:
    average = (5 / total);
    My homepage
    Advice: Take only as directed - If symptoms persist, please see your debugger

    Linus Torvalds: "But it clearly is the only right way. The fact that everybody else does it some other way only means that they are wrong"

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