The limitation on my program is that i am not allowed to use the string library, and need to create my own string functions. My strcmp function is working fine, but my strlen keeps producing an error message. Here is my program:

How can I fix the fucntion/program to get it to work?

#include 2#include stdlib.h> 4 char intersperse(char stringi char *string2)1 s size-t length! = strlen(string1); 6 size t Length2 strlen(string2); 7 char *string3 malloc(lengthl+length2+1) 10 while (string2[k] !='10' 66 stringi [j]!="V0' ){ if (string1j]0) 12 13 14 15 16 17 18 19 20 string2 [1] string1 [j]; if (string2[k] ') ( string3[i] string2[k]: 23 24 25 26 string3 [1] = ' \0' ; 27 return string3; 28 29 31 char widen stars (char stringl char string2) 32 size t lengthl strlen(string1): 33 size-t length2 strlen(string2) ; 34 char string3malloc(2 (engthl+length2+1)); 35 int i=e' j = ? , k=0; 36 37 while (string2[k]|s"10' 66 string1[j]|s.??. H 38 39 40 41 42 43 if (string1[j] !="Ye . ){ string3[i] string1lj1: j++i 45 string3[i] 46 i++, 47