115. Print Binary Representation of an 8-bit or 16-bit Value

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

// Print 8-bit or 16-bit binary with leading 0s
void print_binary(uint16_t val) {
    int bits = (val <= 0xFF) ? 8 : 16;


    for (int i = bits - 1; i >= 0; i--) {
        putchar((val & (1 << i)) ? '1' : '0');
    }
}

int main() {
    uint16_t val;
    scanf("%hu", &val);
    print_binary(val);
    return 0;
}

Why Print Binary?

• Debugging register configurations
• Visualizing bit fields
• Validating user logic in bit manipulations

Logic Summary

• Decide bit-width (8 or 16)
• Loop from MSB to LSB
• Use bitmask and shift to print '1' or '0'