Thread: reading newline

read a newline... Use fgets, that picks up the \n.

Use fgets()

This is what I typed

After a call to fgets() with a suitable buffer, it will look like this
char buff[] = "This is what I typed\n";

I would like to replace all the a's in the text file with \n and all the b's in the text file with \t. How can i archieve this ??
coz my current code it only replace all the a's with ' and all the b's with \. every each of ' , \ , n , \ , t and ' are being read in as character instead of just \n and also \t. I will appreciate if some one is able to modify the code so that it is able to read in \n as a character and \t as a character so that both the character are able to replace the a's and b's in the text file.

testing '\n\t' < textfile.TXT

File name: testing.c

Code:

main(int argc,  char *argv[])
{
char sentence[330];
char c;
int i=0;

while(( c = getchar()) != EOF){
	   sentence[i++] = c;
}
sentence[i] = '\0';

printf("%s",replaceChar(sentence, argv[1]));

}



	
char *replaceChar(char *sN, char *rC)
{
int new_len,i;

	new_len = strlen(sN);
                for(i=0; i< new_len; i++)
                {
                            if(*sN == 'a')
                                        *sN = *rC;
                            else if(*sN == 'b')
                            {
                                     rC++;
                                     *sN = *rC;
                                     rC--;
                            }
							sN++;

                }


                for(i=0; i< new_len; i++)
	{
                	sN--;
	}
	return sN;
}

Originally posted by winsonlee
I would like to replace all the a's in the text file with \n and all the b's in the text file with \t. How can i archieve this ??
coz my current code it only replace all the a's with ' and all the b's with \. every each of ' , \ , n , \ , t and ' are being read in as character instead of just \n and also \t. I will appreciate if some one is able to modify the code so that it is able to read in \n as a character and \t as a character so that both the character are able to replace the a's and b's in the text file.

testing '\n\t' < textfile.TXT

Format your code properly. Don't use TABs:

Code:

int main(int argc,  char *argv[])
{
    char sentence[330];
    char c;
    int i=0;

    while(( c = getchar()) != EOF)
    {
        sentence[i++] = c;
    }
    sentence[i] = '\0';

    printf("%s",replaceChar(sentence, argv[1]));
    return 0;
}
	
char *replaceChar(char *sN, char *rC)
{
    int new_len,i;

    new_len = strlen(sN);
    for(i=0; i< new_len; i++)
    {
        if(*sN == 'a')
                *sN = *rC;
        else if(*sN == 'b')
        {
            rC++;
            *sN = *rC;
            rC--;
        }
    sN++;
    }

    for(i=0; i< new_len; i++)
    {
        sN--;
    }
    return sN;
}

The problem is from the commande line the values in
testing '\n\t' < textfile.TXT
are characters ', \, n, and t. From the command line you cannot pass in a newline and tab. In your main() you'd have to parse your argv[1] and replace the characters \ & n with the single character '\n'