added unusedKeySize to outputFlags

this returns positive number, which represents how many chars from key are unused

include/flags.h

@@ -32,6 +32,7 @@ typedef struct
 {
     char *outputText; //VARIABLE FOR ENCRYPTED/DECRYPTED TEXT
     char *usedKey; //VARIABLE FOR USED/GENERATED KEY
+    unsigned long unusedKeySize;
 } outputFlags;
 
 //VARIABLES

include/misc.h

@@ -9,5 +9,6 @@ void deallocateOutput(outputFlags flags); //DEALLOCATES flags
 void checkKey(char *key, inputFlags flags); //CHECKS IF KEY IS VALID
 void checkText(char *text, inputFlags flags); //CHECKS IF TEXT IS VALID
 unsigned long countIntLength(int number); //RETURNS LENGTH OF number
+unsigned long countUnusedKeySize(char *text, char *key); //COUNT unusedKeySize
 
 #endif

src/lib/decrypter.c

@@ -96,7 +96,8 @@ outputFlags decryptText(char *text, char *keyNew, inputFlags flags)
     outputFlags output =
     {
         returningText, //DECRYPTED TEXT
-        key //USED KEY
+        key, //USED KEY
+        countUnusedKeySize(text, key)
     };
 
     //DEALLOCATION

src/lib/encrypter.c

@@ -116,7 +116,8 @@ outputFlags encryptText(char *text, char *keyNew, inputFlags flags)
     outputFlags output =
     {
         returningText, //ENCRYPTED TEXT
-        key //GENERATED/USED KEY
+        key, //GENERATED/USED KEY
+        countUnusedKeySize(text, key) // NUMBER OF UNUSED CHARS IN KEY
     };
 
     //DEALLOCATION

src/lib/misc.c

@@ -211,3 +211,15 @@ unsigned long countIntLength(int number)
 
     return returning;
 }
+
+unsigned long countUnusedKeySize(char *text, char *key)
+{
+    unsigned long returning = 0;
+
+    if (strlen(key) / 2 > strlen(text))
+    {
+        returning = strlen(key) - 2 * strlen(text);
+    }
+
+    return returning;
+}