Vfrdtyky

i have no idea what is wrong with my code i am using visual studio and it says that i dont have an identifier and im not 100% sure what it means im basically having to write a new function for pow i didnt really understand it to much but if someone could look at my code it would be really helpful thank you

// Programmer:     Your Name

// Date:           Date

// Program Name:   The name of the program

// Chapter:        Chapter # - Chapter name

// Description:    2 complete English sentences describing what the  program does,

//                 algorithm used, etc.

#define _CRT_SECURE_NO_WARNINGS // Disable warnings (and errors) when using non-secure versions of printf, scanf, strcpy, etc.

#include <stdio.h> // Needed for working with printf and scanf

#include <math.h>

#include <string.h>



int main(void)

{

    // Constant and Variable Declarations

    double power(double num, int power) {

        double result = 1;

        if (power > 0) {

            int i = 0;

            for (i = 0; i < power; i++) {

                result *= num;

            }

            return result;

        }

        else {

            if (power < 0) {

                power *= -1;

                int i = 0;

                for (i = 0; i < power; i++) {

                    result *= num;

                }

            }

            return 1 / result;

        }

    }

    int main(void)

    {

        double number;

        int p;

        printf("Enter a number to raise to a power : ");

        scanf("%lf", &number);

        printf("Enter the power to raise %.2lf to : ", number);

        scanf("%d", &p);

        printf("%.2f raised to the power of %d is : ", p);

        double result = power(number, p);

        double mathPow = pow(number, p);

        printf("n%-20s%-20sn", "My Function", "Pow() Function");

        printf("%-20.2f%-20.2fn", result, mathPow);

        return 0;

    }

    // *** Your program goes here ***

    return 0;

} // end main()

You can't (or at least shouldn't) define functions inside functions in C.

cc -Wall -Wshadow -Wwrite-strings -Wextra -Wconversion -std=c99 -pedantic -g `pkg-config --cflags glib-2.0`   -c -o test.o test.c

test.c:15:41: error: function definition is not allowed here

    double power(double num, int power) {

                                        ^

test.c:36:5: error: function definition is not allowed here

    {

    ^

And you have two main functions. main is the function which gets run by the operating system when the program is run. You only need one.

There's a couple other problems...

test.c:41:52: warning: format specifies type 'double' but the argument has type 'int' [-Wformat]

    printf("%.2f raised to the power of %d is : ", p);

            ~~~~                                   ^

            %.2d

test.c:41:42: warning: more '%' conversions than data arguments [-Wformat]

    printf("%.2f raised to the power of %d is : ", p);

That printf is missing an argument. It should be...

printf("%.2f raised to the power of %d is : ", number, p);

With those fixes it works fine.

You can DRY up power by defining a second function just for positive numbers.

double power_positive(double num, int power) {

    int i = 0;

    double result = 1;

    for (i = 0; i < power; i++) {

        result *= num;

    }

    return result;

}



double power(double num, int power) {

    if (power < 0) {

        return 1 / power_positive(num, -power);

    }

    else {

        return power_positive(num, power);

    }

}