Thread: reading from a 2d array

  1. #1
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    reading from a 2d array

    I have a 2d array of characters and now i am trying to read from it and writing to a file. The thing is that the file seems to get created but there is nothing in it. Please let me know where i am going wrong


    [insert]
    Code:
    #include <stdlib.h>
    #include <stdio.h>
    #include <string.h>
    #include <time.h>
    
    #define MAX_WORD_LENGTH 31
    #define MAX_WORDS 50
    
    /* Function prototypes */
    int readFile(char* inputFileName, int* wordCount, char array[][MAX_WORD_LENGTH], int flag);
    //int qsort(char array[][MAX_WORD_LENGTH], int* wordCount);
    int writeToFile(char* outFileName, int wordCount, char array[][MAX_WORD_LENGTH]);
    //void printTime(time_t  begin);
    void usage(char* processName);
    // enter any other function prototype you may wish
    
    int main(int argc, char* argv[])
    {
    		char array[MAX_WORDS][MAX_WORD_LENGTH];
    
    		int wordCount = 0; 
    		
           	switch (argc)
    		{
    		case 3:
    			readFile(argv[1], &wordCount, array,0);
    			writeToFile(argv[2], wordCount, array);
    			break;
    		case 4:
    		{
    			if (strcmp(argv[1], "-s") == 0)
    			  {
    			   readFile(argv[2], &wordCount, array,1);
         		   writeToFile(argv[3], wordCount, array);
    			  }
    			else if (strcmp(argv[1], "-t") == 0)
    			  {
    			    readFile(argv[2], &wordCount, array, 2);
    			    writeToFile(argv[3], wordCount, array);
    			  }
    			else
    			  {
    			    usage(argv[0]);
    			  }
    			break;
    		}
    		case 5:
    		default:
    	        usage(argv[0]);
    	        break;
    
    		
    	}
    	return 0;
    }
    
    // Define all your functions here
    
    int readFile(char* inputFileName, int* wordCount, char array[][MAX_WORD_LENGTH], int flag)
    {
    	FILE *fp;
    	fp = fopen(inputFileName, "r");
    
    	if(fp == NULL)
    	{
    		printf("\n Unable to open the file. Aborting");
    		exit(EXIT_FAILURE);
    
    	}
    
    	while(fscanf(fp, "%s", array[(*wordCount)++]) > 0);
    
    		return 0;
    }
    
    int writeToFile(char* outFileName, int wordCount, char array[][MAX_WORD_LENGTH])
    {
    	int i = 0;
    	FILE *fp;
    	fp = fopen(outFileName, "w");
    
    	if(fp == NULL)
    	{
    		printf("\n Unable to open the file. Aborting");
    		exit(EXIT_FAILURE);
    	}
    	
    	for(i = 0; i< wordCount; i++)
    	{
    		fprintf(fp, "%s\n", array[i++]);
    	}
    
    	return 0;
    }
    
    void usage(char* processName)
    {
      printf("Usage %s [-s] [-t] inputFileName outputFileName\n", processName);
    }

  2. #2
    Hurry Slowly vart's Avatar
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    Posts
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    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    David J. Wheeler

  3. #3
    Jack of many languages Dino's Avatar
    Join Date
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    Location
    Katy, Texas
    Posts
    2,309
    It's a good idea to close files after you are finished with them.
    Mac and Windows cross platform programmer. Ruby lover.

    Quote of the Day
    12/20: Mario F.:I never was, am not, and never will be, one to shut up in the face of something I think is fundamentally wrong.

    Amen brother!

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