Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // Write your code here
    if(mode==1)
    {
     reg |= (1<<pos);
    }
    if(mode==0)
    {
     reg&=~(1<<pos) ;
    }
    return reg;
}

int main() {
    unsigned char reg;
    int pos, mode;
    scanf("%hhu %d %d", &reg, &pos, &mode);
    printf("%d", modifyBit(reg, pos, mode));
    return 0;
}

Solving Approach

If the register was 16-bit?

We would use:

unsigned short 

For 32-bit registers:

unsigned int 

For 64-bit registers:

unsigned long long