---
title: 分配随机数流函数
description: "分配随机数流stream。"
url: https://www.hikunpeng.com/document/detail/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0490.html
sourcePath: /source/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0490.html
indexId: 00a5ea989bd2f4e28f73b09b2f405ecac2602f5e3b97a280209f6dfd374e562661
---
# 分配随机数流函数

分配随机数流stream。

#### 接口定义

int vslLeapfrogStream(VSLStreamStatePtr stream, const SizeType k, const SizeType nstreams);


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| stream | VSLStreamStatePtr类型指针 | 指向随机数流结构体的指针。 | 输入、输出 |
| k | SizeType | 节点下标。 | 输入 |
| nstreams | SizeType | 节点最大数量。 | 输入 |


#### 依赖

#include "krng.h"


#### 示例

```
#include <stdio.h>
#include <stdlib.h>
#include "krng.h"
int main()
{
/* initialize stream with given BRNG type and seed */
VSLStreamStatePtr stream;
unsigned seed = 42;
int errcode = vslNewStream(&stream, VSL_BRNG_MCG59, seed);
if (errcode != VSL_STATUS_OK) {
fprintf(stderr, "Failure in newstream\n");
return 0;
}
int n = 10;
int nstreams = 10;
if (vslLeapfrogStream(stream, n, nstreams)) {
fprintf(stderr, "Failure in vslLeapfrogStream, skip = %d\n", forward_skip);
return 0;
}
/* deinitialize the stream */
errcode = vslDeleteStream(&stream);
if (errcode != VSL_STATUS_OK) {
fprintf(stderr, "Failure in deleting stream\n");
return 0;
}
return 0;
}
```