Thread: Help ignoring spaces.

  1. #1
    Registered User
    Join Date
    Jul 2007
    Posts
    20

    Help ignoring spaces.

    i have writen a program which basically does a form of SSC. it loads two arrays and then prints them.

    then takes a user input and changes the a's to d's (just an example), but i want to make it ignore the spaces a user may enter and just push the letter together.

    so if a user enters "AND THE", i want the out put to be "ANDTHE", but at the mo im just getting "AND", really struglling with it. ive tryed a few things but with no sucsses.

    Also just a little thing. does anyone no how to allow a user to enter a file name. then a file ive already writen to be put into to it and then writen.

    Thanks everyone, any help welcome, heres my code.

    Code:
    #include <stdio.h>
    #include <ctype.h>
    #include <string.h>
    #define MAX_BUF 27
    
    
    void main ()
    {
            FILE *file = fopen( "key.txt", "r" );
    		char input[25]; //input
            char array[25]; //cypher text
    		char i;
    		char alp[25]; //alphabet
    		printf("This program will take Capital letters only and code them\n");
            if ( file == 0 )
            {
                printf( "Could not open file\n" );
            }
            else 
            {
                int x;
    
    
    	    int num = 0;
                while  ( ( x = fgetc( file ) ) != EOF )
                {
                   
                    
    		if( num < (MAX_BUF-1) ) {
    		  array[num++] = x;
    		}
    				
                }
    			array[26] = '\0';
           
    	printf("Cypher Text: \n%s", array );
    	printf("\n");
            }
    		
            
    	
    	FILE *fp = fopen( "alpha.txt", "r" );
    		
             
            if ( fp == 0 )
            {
                printf( "Could not open file\n" );
            }
            else 
            {
                int x;
    
    
    	    int num = 0;
                while  ( ( x = fgetc( fp ) ) != EOF )
                {
                    
    
                    
    		if( num < (MAX_BUF-1) ) {
    		  alp[num++] = x;
    		}
    				
                }
    			    alp[26] = '\0';
    	
    	printf("Alphabet: \n%s", alp);
    	printf("\n");
            }
        
    	
    	
    	
    	printf("\nPlease enter a line of text to be coded: ");
    	scanf("%s",&input);
    	printf("\n");
    	
    	for (i = 0; i < strlen(input);++i)
    	{
    		input[i] = toupper (input[i]);
    		
    	}
    	
    	printf("Your text in upper case:%s\n",input);
    	
    	// MAKE A TEXT THAT SAYS ALL OTHER SYMBOLS WILL BE REMOVED IN "THE NAME A USER ENTERED"
    	
    		for (i = 0; i < strlen(input);++i){
    	if (input[i] == alp[0])
    		input[i] = array[0];
    	else if(input[i] == alp[1])
    		input[i] = array[1];
    	else if(input[i] == alp[2])
    		input[i] = array[2];
    	else if(input[i] == alp[3])
    		input[i] = array[3];
    	else if(input[i] == alp[4])
    		input[i] = array[4];
    	else if(input[i] == alp[5])
    		input[i] = array[5];
    	else if(input[i] == alp[6])
    		input[i] = array[6];
    	else if(input[i] == alp[7])
    		input[i] = array[7];
    	else if (input[i] == alp[8])
    		input[i] = array[8];
    	else if (input[i] == alp[9])
    		input[i] = array[9];
    	else if (input[i] == alp[10])
    		input[i] = array[10];
    	else if (input[i] == alp[11])
    		input[i] = array[11];
    	else if (input[i] == alp[12])
    		input[i] = array[12];
    	else if (input[i] == alp[13])
    		input[i] = array[13];
    	else if (input[i] == alp[14])
    		input[i] = array[14];
    	else if (input[i] == alp[15])
    		input[i] = array[15];
    	else if (input[i] == alp[16])
    		input[i] = array[16];
    	else if (input[i] == alp[17])
    		input[i] = array[17];
    	else if (input[i] == alp[18])
    		input[i] = array[18];
    	else if (input[i] == alp[19])
    		input[i] = array[19];
    	else if (input[i] == alp[20])
    		input[i] = array[20];
    	else if (input[i] == alp[21])
    		input[i] = array[21];
    	else if (input[i] == alp[22])
    		input[i] = array[22];
    	else if (input[i] == alp[23])
    		input[i] = array[23];
    	else if (input[i] == alp[24])
    		input[i] = array[24];
    	else if (input[i] == alp[25])
    		input[i] = array[25];
    	else if (90 >input[i] < 65)
    		input[i] = ' ';
    	
    	
    	input[i] = input[+i];
    
    		}
    
    	
    
    
    	input[26] = '\0';
    	FILE *out;
        out = fopen("out.txt","w");
    	fprintf(out,"%s",input); //putting coded text in to out.txt
    		
    	fclose( file );
        
    }
    any help welcome

  2. #2
    Hurry Slowly vart's Avatar
    Join Date
    Oct 2006
    Location
    Rishon LeZion, Israel
    Posts
    6,794
    1. int main
    2. if fopen failed - do not continue, print the error and exit
    return -1; to indicate the error (that's why main should return the int - see FAQ)
    3. if you have MAX_BUF define - use it - instead of magical number 25
    currently array[26] is out of bounds access, event array[25] is out of bounds
    if you declare
    char array[SIZE] valid indexes are from 0 to SIZE-1
    4. in your loop reading chars - check the current index to prevent buffer overrun
    Code:
       if (index == MAX_BUF)
          break; /* buffer is full - no more chars can be written */
    5. when you read the char - check isupper - and put it in the array only if this is true
    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

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