Set or Clear a Specific Bit in a Register

Code

#include <stdio.h>

unsigned char modifyBit(unsigned char reg, int pos, int mode) {
    if (mode==1)  //if mode is 1 then we are setting that pariticular bit position
{
    reg = reg | (1 << pos);}
    if (mode == 0) 
    reg = 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));
    unsigned char modifyBit;
    return 0;
}

Solving Approach