implemented hexStrLen function into to convert function to dynamically determine hex string length

src/conversionOfNumbers/conversionOfNumbers.c

@@ -64,7 +64,7 @@ int hexStrLen(int input){
 }
 
 char* convertIntToHex(int input){
-    int length = 1;
+    int length = hexStrLen(input);
     int rest;
     char* result = (char*)malloc(sizeof(char) * length + 1);
     result[length] = '\0';