أرجو المساعده

I want to write a program usint the pointer operations and recursion

plz help me because i try to solve it but i faild to have the corect answer

this is my question and i hope that u can help me before monday

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Write a recursive function named Comma_Separated that takes as parameters a pointer to char listptr which represents string1 and a pointer to char textptr which represents string2.The function should copy string1 into string2 but all the characters in string 2 should be separated by comma. The prototype of the function is:

void Comma_Separated (char *listptr, char *textptr);

NOTE: Use pointer operations and recursion only

for example :

The value before calling the function are:

String1="ITCS102", String2=" "

The value after calling the function will be:

String1="ITCS102", String2="I,T,C,S,1,0,2,"

i need ur help plz