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 == 0){
        reg &= ~(1<<pos);
    }
    else if( mode == 1){
        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

Think like you are having two modes if it's mode 0  ,then you have to clear the bit at position (pos) in register , otherwise if it's mode 1 , then you have to set that position (pos) in the register.