Rotate Left in an 8-bit Register

#include <stdio.h>
#include <stdint.h>

#define BIT_CHECK(X)    ((X & 0x80)>>7)

uint8_t rotate_left(uint8_t reg, uint8_t n) {
    // Your code here
    uint8_t temp=0,i=0;
    for(i=0;i<n;i++)
    {
        temp = BIT_CHECK(reg);
        reg = reg<<1;
        if(temp)
        {
            reg |= temp;
        }
        
        
    }
    
    
    return reg;
}

int main() {
    uint8_t reg, n;
    scanf("%hhu %hhu", &reg, &n);
    printf("%u", rotate_left(reg, n));
    return 0;
}