Thread: Raising the power of an interger

You edited it after i posted ;p

Go back to the math. If PWR == 0, then you want to generate 1, if PWR == 1, then you want to generate 1 · 2, if PWR == 2, then you want to generate 1 · 2 · 2 , and so on.

Code:

#include <stdio.h>
#include <stdlib.h>


int main()
{
int loop_counter = 2, PWR = 0; 
printf("enter an interger:\n ");
scanf("%d", &PWR);
for (loop_counter = 0; loop_counter <; loop_counter++)
{
loop_counter*=PWR;
}
system("pause");
return 0;






}

What would be the condition to stop it? loop_counter < PWR?

hat would be the condition to stop it? loop_counter < PWR?

Well, that would be the condition to keep going - but you have the right code, as the loop will stop when the condition becomes false.

Also, keep "loop_counter" separate - don't use it in the calculation. Put the result of the multiplication in a separate variable (perhaps called "result").

"Go back to the math. If PWR == 0, then you want to generate 1, if PWR == 1, then you want to generate 1 · 2, if PWR == 2, then you want to generate 1 · 2 · 2 , and so on."

PWR is a variable for the user inputted exponent. loop_counter is the variable i want to multiply.

So should i multiply result to PWR?

Code:

#include <stdio.h>
#include <stdlib.h>


int main()
{
int loop_counter = 2, PWR = 0, result = 0; 
printf("enter an interger:\n ");
scanf("%d", &PWR);
for (loop_counter = 0; loop_counter < PWR; loop_counter++)
{
result*=PWR;
}
system("pause");
return 0;






}

OOOOOOOOOOOOOOOOOH! I know what you mean by return now lol

Code:

#include <stdio.h>
#include <stdlib.h>


int main()
{
int loop_counter = 2, PWR = 0, result = 0, new_counter = 2; 
printf("enter an interger:\n ");
scanf("%d", &PWR);
for (loop_counter = 0; loop_counter < PWR; loop_counter++)
{
result = new_counter*=PWR;
}
printf("%d\n", result);
system("pause");
return 0;






}

How does this look?

Whenever i input something though it's outputting wrong numbers.

I'm VERY new to coding. I just learned about arithmetic expressions and looping this week in class.

I would have thought that loop_counter++ would of added 1 until it reached the value of PWR. But it's going beyond that.

Originally Posted by sourpatchkid

I would have thought that loop_counter++ would of added 1 until it reached the value of PWR. But it's going beyond that.

That is not the problem. Your for starting at loop counter at 0, and checking for < PWR is OK. You need to initialize result to 1 before starting the loop. Then looking at your loop, what it's currently doing is factorial, not powers of 2, your loop is doing 1 · 2 · 3 · 4 ... . So how can you fix your loop so it's doing 1 · 2 · 2 · 2 ... ?