c++ - 循环中无法生成不同的随机数

Question

for(i=0;i<h;i++)
{    
srand(time(0));
    b[i]=rand()%3;
        }
    在这个循环中b[i]不变 怎样才能让它变化？

Answer 1

b[i] must not change in the loop, because you will initialize PRNG every time you loop.
srand(time(0)); should be placed outside the loop.

Answer 2

srand(time(0));
for(i=0;i<h;i++)
{    
    b[i]=rand()%3;
}