我怎样才能在while循环之外访问数组

如何访问在while循环中填充的循环外的数组？

MAIN.C

#define _CRT_SECURE_NO_WARNINGS #include "Definition.h" #include  #include  #include  extern int Readline(),CountWord(); char Line[500]; /* one line from the file */ char myFileList[300][MaxLine]; char myFileList2[300][MaxLine]; char myFileList3[300][MaxLine]; char myFileList4[300][MaxLine]; int NChars = 0, /* number of characters seen so far */ NWords = 0, /* number of words seen so far */ NLines = 0, /* number of lines seen so far */ LineLength; /* length of the current line */ void *ThreadTask(void *threadarg) { //receive array //match each element with file name in directory //perform counts on each file //print store or return values //printf("%s",myFilesList); } FILE *filep; int main(int argc, char **argv) { int i = 0; filep = fopen(argv[1], "r"); if (!filep){ printf("No %s such file found\n", argv[1]); return -1; } while ((LineLength = Readline(filep))!=0) //here in this loop I split a big file into 4 arrays depending on the number of lines(240). How can I access these newly created arrays outside the while loops. I need to pass them to individual threads as arguments. { if(i>=0 && i=60 && i=120 && i=180){ strcpy(myFileList4[i], Line); //printf("%s\n", myFileList4[i]); i++;} } fclose(filep); } 

Readline.c

 #include "Definition.h" #include "ExternalVar.h" #include  int Readline(FILE *filep) { //Please implement your code here int i = 0; char ch; while (!feof(filep) && i<MaxLine){ ch = fgetc(filep); if (ch == '\n'){ break; } Line[i] = ch; i++; } Line[i] = 0; return i; } 

什么是将while循环中创建的四个数组作为参数传递给线程的最简单方法？ 我每次尝试打印while循环之外的数组都没有什么，当我尝试在while循环中打印出来但在if循环之外时，它们只显示第一行60次。

Answer 1

如果使用PThreads，则使用pthread_create()的最后一个参数将参数传递给tread-function。

Answer 2

您必须将指向数组的指针传递给ReadLine …最好传递最大长度，以避免缓冲区溢出错误。

 #define MAXLEN 240 char Line[MAXLEN+1]; while ((LineLength = Readline(filep, Line, MAXLEN))!=0) { ... } int Readline(FILE *filep, char *Line, int maxlen) { ...