Can't fix warning- some input...

This is a discussion on Can't fix warning- some input... within the C++ Programming forums, part of the General Programming Boards category; Got a warning...like to fix...(I know warning are generally fine...but want to fix)- In bold 20 C:\Documents and Settings\HP_Owner\Desktop\PA2C.cpp [Warning] ...

  1. #1
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    Can't fix warning- some input...

    Got a warning...like to fix...(I know warning are generally fine...but want to fix)- In bold

    20 C:\Documents and Settings\HP_Owner\Desktop\PA2C.cpp [Warning] passing `double' for converting 3 of `double futureInvestmentValue(double, double, int)'


    Code:
    #include <iostream>
    #include <cmath>
    using namespace std;
    
    double futureInvestmentValue(double IA, double MIR, int NOY);
    
    int main()
    {
      double investmentAmount, annualInterestRate, numOfYears,  monthlyInterestRate, futureValue;
      
      cout << "Enter investment amount: ";
      cin >> investmentAmount;
      cout << "Enter monthly interest rate: ";
      cin >> annualInterestRate;
      cout << "Enter number of years: ";
      cin >> numOfYears;
    
      monthlyInterestRate = annualInterestRate / 1200;
      
      futureValue = futureInvestmentValue(investmentAmount,monthlyInterestRate,numOfYears); 
    
      cout << "Future value is " << futureValue << endl;
      
      return 0;
    }
    double futureInvestmentValue(double investmentAmount, double monthlyInterestRate, int numOfYears)
    {
         double accumulatedValue;  
         
         accumulatedValue = investmentAmount * pow(1 + monthlyInterestRate, numOfYears * 12);
         
         return accumulatedValue;
    }

  2. #2
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    we enginners bother only about errors not WARNINGS !!!!!!!!!!!!!!!!!!!



    so ignore it

    ...
    sorry i didnt read your post

  3. #3
    Not stupid, just stupider yaya's Avatar
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    It is a warning, so you can ignore it. But the problem is that you have said that numOfYears is a double, when the futurInvestmentValue function is asking for an int.

  4. #4
    Registered User Tonto's Avatar
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    Your third parameter 'numOfYears' to the function is supposed to be an int, but you pass it a double

    Code:
    double investmentAmount, annualInterestRate, numOfYears,  monthlyInterestRate, futureValue;
    So you get an implicit type conversion

    Floating to Integral (C++)
    Standard Conversions (C++)

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  5. #5
    and the hat of wrongness Salem's Avatar
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    > we enginners bother only about errors not WARNINGS !!!!!!!!!!!!!!!!!!!
    > so ignore it
    You're not an engineer then.

    All warnings are errors.

    If you have warnings, you're on the slippery slope of seeing "how much can I get away with before it breaks".
    One or two is OK (usually), but by the time you're up into the 1000's, you've got a big-assed problem on your hands.

    What's worse, with 1000's of warnings, you just don't see 1001 appear as one you REALLY should be paying attention to.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  6. #6
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    Thanks got the warning fixed...

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