值保持不变更新结构数组值后 [英] Values stays the same after updating a struct array value

问题描述

我有一个包含文件 2 ^ 32 键/值对像;

  32410806935257552 7355088504912337885
32422108164434515 8864339902215816897
32476145725020530 3183682744179377405
32554129507725755 7487866067392975840
32556703862039701 6580190515895793022
32576110112978588 468697310917255961
32589559935917707 757063057981860288
32724197203660231 4397507527199428746
32740607750878547 497049298362389181
32804063187658851 690408619066859126
....
 

我需要读取该文件，并获得 1000行每次我需要时间。

我使用了以下功能本;

 无效setChunk（双*双，INT setNumber，FILE *文件）{
    INT开始= setNumber * 1000;
    INT完成=开始+ 1000;
    诠释计数= 0;
    INT I = 0;
    焦线[C];
    字符*搜索=;    的printf（块设置％d到％d个\\ n之间，启动完成）;
    如果（文件！= NULL）{        而（与fgets（行，sizeof的线，档案）！= NULL）/ *读取一行* /
        {
            如果（计数＆GT; =＆开始放;＆安培; COUNT＆LT;完成）
            {
                对[I] =。关键的strdup（strtok的（行，搜索））;                对[I]。价值=的strdup（的strtok（NULL，搜索））;                我++;
            }            算上++;
        }
    }
}
 

这是我在第1000数以千计的key / value 对，并写入到结构阵列（对）与没问题。然后我试图让下一个几千双，但键/值结构数组保持不变。我无法更新其内容。可能是什么原因呢？

请注意： setNumber 定义哪一个几千双我会抓住。如果是 0 ，我得到 0-1000 之间的界限，如果是 18 ，我得到的线 18000-19000 。

我在这样的循环中调用setChunk funtion;

 为（J = 0; J＆LT; = fileNumber; J ++）{
        如果（文件[J]！= NULL）
        {
            的printf（％d个块开始填\\ n，J）;
            对[J] =的malloc（1000 * sizeof的（对））;
            setChunk（对[J]，setnumber [J]，文件[J]）;
            setnumber [J] + = 1;
        }
    }
 

解决方案

对于这些行：

  setChunk（对[J]，setnumber [J]，文件[J]）;
setnumber [J] + = 1;`
 

在 setnumber 是一个数组，

（让我们假设它被初始化为全0）。

所以进入setnumber [0]传递的第一个电话。然后setnumber [0]被递增到1

在下次调用setnumber [1]在电话会议上通过，那么setnumber [1]递增到1。

即。在每次调用的第二个参数始终为0。

I have a file which contains 2^32 key/value pairs like that;

32410806935257552 7355088504912337885
32422108164434515 8864339902215816897
32476145725020530 3183682744179377405
32554129507725755 7487866067392975840
32556703862039701 6580190515895793022
32576110112978588 468697310917255961
32589559935917707 757063057981860288
32724197203660231 4397507527199428746
32740607750878547 497049298362389181
32804063187658851 690408619066859126
....

I need to read that file and get the 1000 lines every time I need.

I am using the function below for this;

void setChunk(pair* pairs, int setNumber, FILE *file){
    int start = setNumber * 1000;
    int finish = start + 1000; 
    int count = 0;
    int i = 0;
    char line [c];
    char *search = " ";

    printf("chunk is set between %d and %d\n", start, finish);
    if ( file != NULL ){

        while (fgets(line, sizeof line, file) != NULL) /* read a line */
        {
            if (count >= start && count < finish)
            {  
                pairs[i].key = strdup(strtok(line, search));

                pairs[i].value = strdup(strtok(NULL, search));

                i++;
            }

            count++;
        }   
    }
}

I am taking the first 1000 thousands key/value pair and write into the struct array (pairs) with no problem. Then I try to get next one thousands pairs but, the key/value struct array stays the same. I couldn't update its content. What can be the reason for this?

note: setNumber defines the which one thousands pairs I will take. If it is 0, I get the lines between 0-1000, if it is 18, I get the lines 18000-19000.

I'm calling setChunk funtion in a loop like this;

for(j=0; j<=fileNumber; j++){
        if ( file[j] != NULL )
        {
            printf("%d. chunks is started to fill\n", j);
            pairs[j] = malloc(1000 * sizeof(pair));
            setChunk(pairs[j],setnumber[j],file[j]);
            setnumber[j]+=1;
        }
    }

解决方案

regarding these lines:

setChunk(pairs[j],setnumber[j],file[j]); 
setnumber[j]+=1;`  

the setnumber is an array,

(lets assume it is initialized to all 0s.)

So entry setnumber[0] is passed on the first call. then setnumber[0] is incremented to 1

On the next call setnumber[1] is passed on the call, then setnumber [1] is incremented to 1.

I.E. on every call the second parameter is always 0.

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