How to use exponents with Objective-C in Xcode

//Here are three files that were used to solve your problem. I hope it helps!

#import <Foundation/Foundation.h>

@interface XtoPowerOfY : NSObject {

int x;

int y;

intanswer;

}

@property int x, y, answer;

- (void)displayXtoY;

@end

#import "XtoPowerOfY.h"

@implementation XtoPowerOfY

@synthesize x, y, answer;

-(void)displayXtoY

{

answer = pow(x,y);

NSLog(@"x to the Power of y = %d", answer);

}

#import <Foundation/Foundation.h>

#import "XtoPowerOfY.h"

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePoolalloc] init];

// insert code here...

XtoPowerOfY *z = [[XtoPowerOfYalloc]init];

z.x = 2;

z.y = 3;

[z displayXtoY];

[z release];

[pool drain];

return 0;

}

http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/ man3/pow.3.html

answer = pow(x,y);//this line find the value of x raised to the power of y.

From the above line, the value of y would be 2. That would produce x^2. You would then have to add another two variables, e.g.

int y = 2;

int p = pow(q,y);// this line would then produce q raised to the power of 2.

You can also copy my code into the appropriate files and run the program to see how it operates. I tested it and it runs without errors.

I hope this solves your problem.

This should be as simple as:

int

main(int argc, char *argv[])

{

    double x = 5;

    double res = 3 * pow(x, 3) - 5 * pow(x, 2);

    NSLog(@"x %lf, result %lf", x, res);

    return 0;

}

It's not really Objective C though, it's regular C.

Ben.