Write a Macro’s Set,clear and toggle n’th bit using bit wise operators?

 

#include<stdio.h> 

void bin(unsigned n);

#define SetBit(number,bit) (number|=(1<<bit-1))		

#define ClearBit(number,bit) (number&=(~(1<<bit-1)))

#define Toggle(number,bit) (number ^ (1<<bit-1))


int main() 
{ 
	int i=7;
	printf("\n Binary of 7 is      : ");
	bin(i);
	
	i=SetBit(i,4);	
	printf("\n\n Set 4th bit of 7    : ");
	bin(i);
	
	i=ClearBit(i,4);	
	printf("\n\n Clear 4th bit of 7  : ");
	bin(i);

	i=Toggle(i,1);	
	printf("\n\n Toggle 1st bit of 7 : ");
	bin(i);
	
	return 0;
} 

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

 

Output

 

Suggested Reading

1. Count number of 1s in given binary number
2. Find position of the only set bit
3. Write a c program to implement XOR functionality with out using XOR(^) operator