如何在c中打印位

#include <stdio.h>

void printBinary(unsigned int num) {
    // 计算整数的位数
    int bits = sizeof(num) * 8;
    unsigned int mask = 1 << (bits - 1);

    // 逐位打印
    for (int i = 0; i < bits; i++) {
        if (num & mask) {
            putchar('1');
        } else {
            putchar('0');
        }
        mask >>= 1;
    }
}

int main() {
    unsigned int num = 42; // 示例数字
    printf("Binary representation of %u is: ", num);
    printBinary(num);
    printf("\n");
    return 0;
}