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Thread: C++ program to calculate exponent

  1. #1
    Join Date
    Mar 2005

    C++ program to calculate exponent

    Please help, I need to write a program to calculate exponent. Below is what I have. I don't even know where to begin.


    Declare x as float
    Declare y as integer
    Declare i as integer
    Declare result as float

    Input x // can be any float
    Input y // has to be a positive integer

    Set result = 1 // initial value

    For i = 1 to y
    result = result * x

    End for

    Output result


    #include <iostream>

    using namespace std ;

    int main()
    Write code to declare all the variables.

    // read in the two numbers

    cout << endl ;
    cout << "Enter number to be raised to power(float) : ";

    cin >> y ;
    cout << "Enter the exponent (positive integer) : " ;
    cin >> x ;

    Initialize any variables that need to be initialized.

    for ( )

    Write the code for the for-loop initializations
    and the for-loop body. Carefully study and compare
    the pseudocode and C++ for loops in the commentary.


    // display the result

    cout << endl ;
    cout << "The value of" << x << " to power " << y
    << " is : " << result << endl ;

    return (0); // terminate with success


  2. #2
    Join Date
    Dec 2003
    The top comment tells you exactly what to do!
    a variable is declared by
    type name;
    float x;
    int number;

    But you need to sit down and read your book for the class, and learn how to write a loop, etc.

  3. #3
    Join Date
    Jul 2004
    You could write a function that can do the math for you. Here is an example:

    int powerFunc(int x, int y)
    for (int i = 0; i < x; i++)
    sum *= y; // here it will keep mulitplying itself until
    // the condition is met

    return (sum);

    your main would look like this:

    int result = powerFun(x,y);

  4. #4
    Join Date
    Mar 2005
    Ok, i now know what i need to do. Thanks for your help.

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