34 lines
759 B
C
34 lines
759 B
C
|
/*
|
||
|
|
* C Program that uses Function to return MSB position of unsigned Integer
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#define NUM_BITS_INT 32
|
||
|
|
int int_msb_position(int n);
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
int n, pos;
|
||
|
|
printf("Enter a number : ");
|
||
|
|
scanf("%d", &n);
|
||
|
|
pos = int_msb_position(n);
|
||
|
|
printf("\nPosition of MSB bit = %d\n", NUM_BITS_INT - (pos + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Function to find the MSB bit position */
|
||
|
|
int int_msb_position(int n)
|
||
|
|
{
|
||
|
|
int i = 0, bit;
|
||
|
|
while (i < NUM_BITS_INT)
|
||
|
|
{
|
||
|
|
bit = n & 0x80000000;
|
||
|
|
if (bit == -0x80000000)
|
||
|
|
{
|
||
|
|
bit = 1;
|
||
|
|
}
|
||
|
|
if (bit == 1)
|
||
|
|
break;
|
||
|
|
n = n << 1;
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
return i;
|
||
|
|
}
|