char 'space' ?

[bat78]

Hey,
Usually my posts are pretty self-confusing, so i'll only try to ask easier. I hope to get some luck.

The problem is in my tries to figure out how to set condition if a char is "space".
It works with any other characters like 'r' but with space, it doesn't.
I tried character escape commands like '/0'
Also tried with just ' '
But nothing recognize as a space character.

[DarkParadox]

Just using single quotes with a space in the middle (' ') should work, as it works in my code. You can try comparing it to the number 32 instead like "if(mychar == 32)", since that's the ASCII code for the letter. If that doesn't work either, then there's probably something wrong with your code otherwise.

[bat78]

Just using single quotes with a space in the middle (' ') should work, as it works in my code. You can try comparing it to the number 32 instead like "if(mychar == 32)", since that's the ASCII code for the letter. If that doesn't work either, then there's probably something wrong with your code otherwise.

Hi,
I'm using strchr to compare chars. It works with the alphabetic ones.. like 'r' but if ' ' works i wouldn't make this topic.. i will try with ASCII number but strchr just works on that way..

[skydereign]

I'm using strchr to compare chars.

strchr returns a pointer to a string. It doesn't actually return the character that it finds, but the pointer to it. Are you making sure to dereference the pointer? Though if the alphabetic characters work, then you probably are.

Code: Select all

char* substring = strchr(text, ' ');
if(substring[0] == ' ')
{
     // though really strchr returns null, so if all you want to know is if the space was found
     // you can can just use if(substring != NULL) instead
}

[bat78]

Well basically i tried many ways. And it all works, but not on the way i expected tho.

Code: Select all

    int checksum; checksum = 1;
void flinem(const char * fileName, char * id, int fmax)
{
    FILE * file = fopen(fileName, "r");
    char database[256];

    if (id[fmax] == 32 && checksum == 1) {database[0] = 1; checksum = 0;} else { checksum = 1; }
    if (id[fmax-1] == 32 && checksum == 1) {database[1] = 1; checksum = 0;} else { checksum = 1; }
    if (id[fmax-2] == 32 && checksum == 1) {database[2] = 1; checksum = 0;} else { checksum = 1; }
    if (id[fmax-3] == 32 && checksum == 1) {database[3] = 1; checksum = 0;} else { checksum = 1; }
    if (id[fmax-4] == 32 && checksum == 1) {database[4] = 1; checksum = 0;} else { checksum = 1; }
 
    if (strlen(id) > fmax) {
        if (database[0] == 1) id[fmax] = '\n';
        if (database[1] == 1) id[fmax-1] = '\n';
        if (database[2] == 1) id[fmax-2] = '\n';
        if (database[3] == 1) id[fmax-3] = '\n';
        if (database[4] == 1) id[fmax-4] = '\n';
}
}

The little code should find the last spaces behind the last 5 characters in a line of a text file. And if it finds the first, it does not look for another.
That should work but it still does not. I'm trying to figure out why the heck that is..
That does not work, because it sends sometimes only one character to a new line..

[skydereign]

The little code should find the last spaces behind the last 5 characters in a line of a text file.

So you know, that code doesn't actually load a line of text from the file. If id is supposed to be the line that is already read in, there is no need to pass in the fileName variable. Now from what you are doing, it sounds like you could just loop backwards from the last character in the line of text back 5 characters. During each iteration of the loop you check the character to see if it is a space and then escape the loop.

[bat78]

I'm not sure what you meant...but yeah
fName "text.txt"
id textArray[20]
fmax - the max characters allowed

the code should stop seek for spaces if he finds the first in those 5 chars. so i think you are right, and i could explain it ^^

[skydereign]

Still not sure how you handle the fileName and FILE*, so I just had it read in the first line.

Code: Select all

void flinem(const char* fileName, char* id, int fmax)
{
  FILE* f = fopen(fileName, "r");
  int i;
  int limit;

  fgets(id, 129, f); // read first line into id

  limit = strlen(str)-6; // last 5 characters (last character is null)
  for(i = strlen(str); i>=limit; i--) // loop backwards for 5 characters
  {
    if(str[i] == 32) // if current character is a space
    {
      str[i] = '\n'; // turn it into a newline
      break; // and exit the loop
    }
  }
  // the id string now turned the last space in the end of the string into a newline
}

[bat78]

Oh i'm using the gE default file reading code

[bat78]

Okay, it says, on line 10 there is beyond the allowed area

limit = strlen(id)-6; // last 5 characters (last character is null)

I thought the last char is new line - \n
It does not works again x;

[UPDATE]:
Okay i coded this.. will it works:

Code: Select all

void newLine (const char * fileName, char * lineArray, int maxChars)
{
   FILE * file = fopen(fileName, "wb");
   
   if (strlen(lineArray) > maxChars)
   {
   
   char base[7];
   char * patch; patch = strchr(base, 32);
   
   base[0] = lineArray[maxChars];
   base[1] = lineArray[maxChars-1];
   base[2] = lineArray[maxChars-2];
   base[3] = lineArray[maxChars-3];
   base[4] = lineArray[maxChars-4];
   base[5] = lineArray[maxChars-5];
   base[6] = lineArray[maxChars-6];
   
   lineArray[maxChars] = base[0];
   lineArray[maxChars-1] = base[1];
   lineArray[maxChars-2] = base[2];
   lineArray[maxChars-3] = base[3];
   lineArray[maxChars-4] = base[4];
   lineArray[maxChars-5] = base[5];
   lineArray[maxChars-6] = base[6];
   
   fseek(file, patch - base + 1 , SEEK_SET );
   fputs("\n", file);
   }
}