Got rid of some useless functions and commented all the code

functions.c

@@ -2,41 +2,33 @@
 
 int ask_file() {
 
-	printf ("Insert name of the file to be read : ");
-	fgets(info.filename, info.fileNameSize, stdin);
-	info.filename[strlen(info.filename)-1] = '\0';
-	invert_file();
-	return 0;
-}
-
-int get_file(char *fileName) {
-
-	strcpy(info.filename, fileName);
-	invert_file();
-	return 0;
+	printf ("Insert name of the file to be read : ");	// print this
+	fgets(info.filename, info.fileNameSize, stdin);		// get the file from user input
+	info.filename[strlen(info.filename)-1] = '\0';		// turn the last character into zero
+	return 0;											// to clear the newline character in there
 }
 
 int invert_file(void) {
 
-	if ((info.fd= fopen(info.filename, "r")) != NULL){
-	int ft, i = 0;
+	if ((info.fd= fopen(info.filename, "r")) != NULL){	// If the file opens
+		int ft, i = 0;									// make this two variables to help
+														// going thru the text
+		fseek(info.fd, 0, SEEK_END);					// take the file descriptor pointer
+														// to the end of the file
+		ft = ftell(info.fd);							// Count the file total number of characters
 
-    fseek(info.fd, 0, SEEK_END);
+		while(i < ft) {									// While the characters dont finish
+			i++;										// increment one character
+			fseek(info.fd, -i, SEEK_END);				// go back one character in the text
+			printf("%c", fgetc(info.fd));				// print current character
+		}
+		printf("\n");									// print newline to clear the terminal
 
-    ft = ftell(info.fd);
-    while(i < ft)
-    {
-        i++;
-        fseek(info.fd, -i, SEEK_END);
-        printf("%c", fgetc(info.fd));
-    }
-	printf("\n");
-
-		fclose(info.fd);
+		fclose(info.fd);								// Close the file
 	}
 
-	else {
-		perror(info.filename);
+	else {												// Otherwiser
+		perror(info.filename);							// print failed to open the file
 	}
 
 	return 0;