Question

Using #include <stdio.h>
6) Write a program that computes X^Y (X to the power of Y). You are required to use a while loop to solve the problem. Do not use the pow function from the “math.h” library. You may hard code the variables X and Y in the beginning of your program.
Hint: 5^4 =5*5*5*5

Answer 1

SOURCE CODE IN C:

#include <stdio.h>

//function to calculate x to the power y and return it

double power(int x, int y)

{

//res stores x to power of absolute value of y

int res=1,copy=y;

if(y<0)

copy=-copy; //storing absolute value of y in copy

//calculating x to power of absolute value of y

while(copy!=0)

{

res*=x;

copy-=1;

}

if(y<0) //if y is negative, we return 1/(x to power of absolute value of y)

return 1.0/res;

else //else we return x to power of absolute value of y

return res;

}

int main(void)

{

//testing function

printf("2 to the power 4: %.2f\n",power(2,4));

printf("3 to the power -2: %.2f\n",power(3,-2));

printf("4 to the power 0: %.2f\n",power(4,0));

return 0;

}

OUTPUT: