strings

[nimbus2506]

Hello everyone. I'm looking to expand my knowledge about strings but I am stuck on a particular problem... I am hoping that by writing it down and trying to explain my problem I might be able to think of a solution or get hints on how to solve it.

I want to be able to search through a string for a particular character and insert a word inside.

So for example I have the string "dog" and would like to replace the character "o" with the string "cat".

So the output with be dcatg.
This is what I have so far
but it doesn't work

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

int main(int argc, char *argv[]){

   char str1[15] = "dog";
   char str2[15] = "cat";
   int i;
   char temp[15];   

   for(i=0;i<3;i++){

      if(str1[i]="o"){
         
         for(j=i;j<3;j++){
            temp[j]=str1[j];
         }
         
         strcmp(str1[i], str2);
         
         for(j=i;j<3;j++){
            str1[j]=temp[j];
         }
    }
}
              


return 0;
}

[CommonTater]

Ok, it's probably a good idea that you get more familiar with the string library (#include string.h) and maybe learn a little more about pointers.

Basically what you have to do is locate the desired character an o in this case... take a look at what strchr() does for you.
Once you find it you need to copy out the rest of the string to a temp buffer, which I see you've already made ... look at strcpy() for this
Then you need to inject your new text overwriting all or some of the tail part... again strcpy() does a good job
Finally you need to concactenate (add) the tail back onto your string...

void InjectString(char *dst, char key, char *new)
   { char *ptr;               // pointer for string manipulation
      char temp[16];           // temp buffer for injection
      ptr = strchr(dst,key);          // find key character
      strcpy(temp, ptr);            // copy the tail skipping the key
      strcpy(ptr,new);                //  inject the new text at ptr
      strcat(dst,temp); }            // put the tail back.

You would call this as... InjectString("absolutely",'l',"freaking");
and you would get back absofreakinglutely...

This is why there is a standard C library, it makes tasks like this easy. Yes, you can do it with loops, but that's a lot of work... unless you are deliberately trying to learn about arrays and loops.