Modify a char* string in C

Question

I have this:

char* original = \"html content\";

And want to insert a new

char* mycontent = \"newhtmlinsert\";

Answer 1

You need to use strcat() for this problem.

Example =

/* strcat example */
#include 
#include 

int main ()
{
  char str[80];
  strcpy (str,"these ");
  strcat (str,"strings ");
  strcat (str,"are ");
  strcat (str,"concatenated.");
  puts (str);
  return 0;
}

Though you need to check the bounds so you can use the bounds variant of strncat().

#include 

char *strncat(char *restrict s1, const char *restrict s2, size_t n);

Make sure whatever buffer you are appending your string into has enough space to not cause a buffer overflow.