将long long int的值动态复制到char数组 [英] copy value of long long int to char array dynamically

问题描述

我有一个名为iData;的long long int类型的变量;

I have a variable which is of type long long int named iData;

iData从1计数到最大值.

我需要将此变量复制到char数组.

I need to copy this variable to char array.

我尝试了以下方法

long long int iData;
char cDataBuffer[8];

for(i=0;i<8;i++) {
  cDataBuffer[i]= (iData & 0XFF);
  iData = (iData >>8);
}

但是我想将其存储在指针变量char *pDataBuffer的动态变量中.

But I want to store this in dynamic variable in pointer variable char *pDataBuffer.

有人可以建议如何存储这种变化的iData变量长度.

Can somebody suggest how to store this varying iData variable length.

推荐答案

下面的逻辑将为您提供帮助

Below logic will help you

long long int iData;
char *cDataBuffer;

cDataBuffer = malloc(sizeof(char) * sizeof(iData));

for (i = 0; i < sizeof(iData); i++) 
{
  cDataBuffer[i] = ((iData >> (i * 8)) & 0XFF);
}

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