Code:
#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;
}
Output:
Enter a number : 127
Position of MSB bit = 6
Enter a number : 259
Position of MSB bit = 8
Enter a number : 5
Position of MSB bit = 2
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