[C language] PTA 7-47 binary leading zero

Inside the computer, all the values are expressed in binary . A decimal number , such as 24, In a 32 The computer interior of bit is expressed as 00000000000000000000000000011000. You can see , Count from the left , At the first 1 Before , Yes 27 individual 0. We put these 0 Zero called leading .

Now? , Your task is to write a program , Enter an integer , Output in 32 The number of leading zeros in bit expression .

Input format :

An integer , stay 32 An integer can be expressed in a range of bits .

Output format :

An integer , The expression input is expressed as a 32 Bit binary number , At the first 1 Previous 0 The number of .

sample input :

256

No blank lines at the end

sample output :

23

No blank lines at the end

Their thinking ： There is i, Make a given number n stay 2^（i-1） and 2^i Between . Find that i, Output 32-i. If n It's a negative number , When storing, the first place is 1.

#include<stdio.h>
#include<math.h>
int main(){
	int n;
	int i=0;
	scanf("%d",&n);
    
	
	if(n>=0){
        while(pow(2,i)<=n){
            i++;
        }
    }
    else{
		i=32;
	} 
		printf("%d",32-i);
	return 0;
}