srand(time(nullptr))有编译警告,怎么修改呢?

[tyrant19]

warning C4244: 'argument' : conversion from 'time_t' to 'unsigned int', possible loss of data

我怎么记得C语言的书上面都是用time()函数作为的随机数种子啊，怎么这句话都有警告呢?

[面包大师]

要强转一下，比如

srand( (unsigned)time( NULL ) );

[诶呦]

//srand需要无符号整形
void srand( unsigned int seed );
Parameter seed
Seed for random-number generation

//time的类型是time_t
time_t time( time_t *timer );