Clear Bit

#include <stdio.h>

void printBinary(int n);
void clearBit(int *n, int i);

int main()
{
    int n = 7;

    printBinary(n);
    clearBit(&n, 2);
    printBinary(n);

    return 0;
}

void clearBit(int *n, int i)
{
    *n &= ~(1<<i);
}

void printBinary(int n)
{
    unsigned int i;
    for(i = 1<<31; i >= 1; i >>= 1)
    {
        if(i & n) printf("1");
        else printf("0");
    }
    printf("\n");
}