C動態內存分配 - 從文件讀取數據

Question

我正在從MATLAB複製load（）函數以用於C應用程序。我無法動態加載數據並初始化我需要的數組。更具體地說，我試圖用已經用calloc初始化的數組使用fgets，但我無法使它工作。該功能如下，並感謝幫助。

編輯：更新的代碼是以下有缺陷的示例。

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

void *load(const char *Filename); 

void *load(const char *Filename) 
{ 
    FILE* FID; 
    if ((FID = fopen(Filename, "r")) == NULL) 
    { 
     printf("File Unavailable.\n"); 
    } 
    else 
    { 
     int widthCount = 0, heightCount = 0; 

     char ReadVal; 
     while ((ReadVal = fgetc(FID)) != '\n') 
     { 
      if (ReadVal == ' ' || ReadVal == ',' || ReadVal == '\t') 
      { 
       widthCount++; 
      } 
     } 

     rewind(FID); 
     char* String = calloc(widthCount * 100, sizeof(char)); 
     while (fgets(*String, widthCount+1, FID) != EOF) 
     { 
      heightCount++; 
     } 
     double* Array = calloc(widthCount * heightCount, sizeof(double)); 
     rewind(FID); 
     int i = 0, j = 0; 
     char * pch; 
     while (fgets(*String, widthCount+1, FID) != EOF) 
     { 
      pch = strtok(String, " ,\t"); 
      while (pch != NULL) 
      { 
       Array[i][j] = strtod(pch, NULL); 
       pch = strtok (NULL, " ,\t"); 
       j++; 
      } 
      i++; 
      j = 0; 
     } 

     fclose(FID); 
     return Array; 

    } 

} 

修改後的代碼： 此解決方案，任何人都希望在一個類似的問題。

void *load(const char *Filename) 
{ 
    FILE* FID; 
    if ((FID = fopen(Filename, "r")) == NULL) 
    { 
     printf("File Unavailable.\n"); 
     return NULL; 
    } 
    else 
    { 
     int widthCount = 0, heightCount = 0; 
     double *Array; 
     char Temp[100]; 
     while ((Temp[0] = fgetc(FID)) != '\n') 
     { 
      if (Temp[0] == '\t' || Temp[0] == ' ' || Temp[0] == ',') 
      { 
       widthCount++; 
      } 
     } 
     widthCount++; 
     //printf("There are %i columns\n", widthCount); 
     rewind(FID); 
     while (fgets(Temp, 99, FID) != NULL) 
     { 
      heightCount++; 
     } 
     //printf("There are %i rows\n", heightCount); 
     Array = (double *)calloc((widthCount * heightCount), sizeof(double)); 
     rewind(FID); 
     int i = 0; 
     while (!feof(FID)) 
     { 

      fscanf(FID, "%lf", &*(Array + i)); 
      fgetc(FID); 
      i++; 
     } 

     return Array; 
    } 
} 

Answer 1

數組是不是二維數組，而不是僅僅Array[i][j] = strtod(pch, NULL);遞增指針*(Array++) = strtod(pch, NULL);