Question

I’m looking to insert a HTML string tag into another string before the punctuation.
i.e. Given “Robert:”, I would like to output “Robert:”

Currently I have (apart of a function):

#define fhighlight     "<font_color="red"><b>"
#define bhighlight     "</b></font>"
#define punct          ".,;:!?"
#define wordlen        15
char w[wordlen];
w = "Robert:";
w = strcat(fhighlight,w);
if ((strchr(punct,w)==1) { /*check for punctuation in w*/
   /*not quite sure what to put here*/
} else {
  w = strcat(w,bhighlight);
}

Any help will be greatly appreciated.

Answer 1

strchr() only looks for one character at a time (and you aren’t calling it correctly), so would need to be called in a loop for each character in punct. Here is one function to look for any of them. Also, you are not using strcat() correctly.

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

int char_position(const char *string,const char *chars)
{
   int length = strlen(string);
   while (*chars)
   {
      for (int i = 0; i < length; i++)
      {
         if ( string[i] == *chars )
         {
            return i;
         }
      }
      chars++;
   }
   return -1;
}

const char *highlight(const char *word)
{
#define fhighlight     "<font_color=\"red\"><b>"
#define bhighlight     "</b></font>"
#define punct          ".,;:!?"
#define wordlen        1500
   static char w[wordlen];  
   strcpy(w,fhighlight);
   int position = char_position(word,punct);
   if ( position != -1 )
   {
      strncat(w,word,position);
      strcat(w,bhighlight);
      strcat(w,&word[position]);
   } else {
      strcat(w,word);     
      strcat(w,bhighlight);
   }
   return w;
}


int main(void)
{
   printf("%s\n",highlight("Robert:"));
   printf("%s\n",highlight("Roberta"));
   printf("%s\n",highlight("LaDonna! is coming"));
}