doubt in c to find power of 2

[leeanju2006]

hi
Plz clear my doubt
how to write a code to find the power of 2 in a normal way and in single step?
PLZ REPLY AS SOON AS POSSIBLE

[norman]

One of the way of doing this is using a function named as pow() in function c as below:

#include <stdio.h>
#include <math.h>
main()
{
int n,b;
printf("Input power value");
scanf("%d",n);
b=pow(2,n);
print("%d",b);
}

[leeanju2006]

thank u very much sir. but is there any way to write the code without using the pow( ) fuction ?

[svs_aditya]

Hi leeanju2006,

I didn't get your problem clearly.... are you asking..

anything raised to power of 2... or 2 raised to the power of any thing????
x pow 2 or 2 pow x


1)

if it's x pow 2, then

int main()
{
int x,i ;
scanf("%d',&x);
if(x==0)
printf("1");
else
{
x= x*x;
printf("power of x when raised to power of 2 is :::%d", x);
getch()
}
}

2)

If 2 to be raised to pow of x ( 2 power something)
void main()
{
clrscr();
int d,ans=2,x;
printf("enter the pow to raise the 2");
scanf("%d",&x);
if(x<=0) { printf("1"); }
else
{
for(d=0;d<x-1;d++,ans=ans*2); printf("2 pow %d is ......%d", x, ans);
}
getch();
}


regards,
SVS.Aditya