【c】——unsigned int与unsigned short变量自动转换

c, 类型自动转换

code

#include<iostream>


int main()
{
    unsigned int a = 65537;
    unsigned short b;
    b = a;

    printf("ushort:%d, uint:%d \n", sizeof(unsigned short), sizeof(unsigned int));

    std::cout << a << b << std::endl;
    
    return 0;
}

输出
ushort:2, uint:4
655371

解释：

1. unsigned short占2个字节，16bit，unsigned int占4字节，32bit
2. 65537的二进制为10000000000000001，转成unsigned short时，值保留低位的16bit，就是0000000000000001，然后其转为整数就是1。