Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    // this to set a bit
    if(mode==1)
    {
        reg |= (1<<pos);
    }

    // this is to reset a bit
    else 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