How many bits?

• Problem Description

  
  Sasha ask Diya to write a program to get minimum number of bits to store an integer number. Devi thinks a lot but she could not able to do this.Can you help her to derive a solultion for this?
  

• Test Case 1

  
  Input (stdin)

  127
  
  

  Expected Output

  7

• Test Case 2

  
  Input (stdin)

  32767
  
  

  Expected Output

  15

• Program

• #include <stdio.h>
  int countbit(int);
  int main()
  {
    int num;
    scanf("%d",&num);
    printf("%d",countbit(num));
    return 0;
  }
  int countbit(int n)
  {
    int count=0,i;
    if(n==0) return 0;
    for(i=0;i<32;i++)
    {
      if((1<<i)&n)
        count=i;
    }
    return ++count;
  
  
  
  }