将4字节整数写入char*数组

#include <iostream>
#include <cstring>

void writeIntToCharArray(int num, char* array) {
    // 确定字节顺序为小端序
    // 将整数转换为字节表示
    unsigned char bytes[4];
    bytes[0] = (num >> 0) & 0xFF;
    bytes[1] = (num >> 8) & 0xFF;
    bytes[2] = (num >> 16) & 0xFF;
    bytes[3] = (num >> 24) & 0xFF;

    // 写入char*数组
    memcpy(array, bytes, 4);
}

int main() {
    int num = 123456789;
    char array[4];

    writeIntToCharArray(num, array);

    // 输出char*数组中的字节
    for (int i = 0; i < 4; i++) {
        std::cout << static_cast<int>(array[i]) << " ";
    }
    std::cout << std::endl;

    return 0;
}