如果函数循环，则带种子的rand不返回随机值 [英] rand with seed does not return random if function looped

问题描述

我在下面编写了此C代码，当我循环时，它返回一个随机数.如果执行myrand()，如何获得5个不同的随机值?

I wrote this C code below, when I loop, it returns a random number. How can I achieve the 5 different random values if myrand() is executed?

#include <stdio.h>
#include <stdlib.h>

int myrand() {
    int ue_imsi;
    int seed = time(NULL);
    srand(seed);
    ue_imsi = rand();

    return ue_imsi;
}

int main()
{
    int value = 0;
    int i=0;
    for (i=0; i< 5; i++)
    {
        value =myrand();
        printf("value is %d\n", value);
    }
}

推荐答案

种子生成器应该执行一次(当然，对于您要生成的每个随机数序列！):

Seeding the generator should be done once(for each sequence of random numbers you want to generate of course!):

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int seed = time(NULL);
    srand(seed);
    int value = 0;
    int i=0;
    for (i=0; i< 5; i++)
    {
        value =rand();
        printf("value is %d\n", value);
    }
}

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