diff --git a/src/main/c/Template/Battleship_game.c b/src/main/c/Template/Battleship_game.c
index 83bea8b..315a2aa 100644
--- a/src/main/c/Template/Battleship_game.c
+++ b/src/main/c/Template/Battleship_game.c
@@ -31,6 +31,40 @@ int feld(char prifield[]) {
 	return 0;
 }
 
+int convertcoor(char a, int b) {
+
+	int co = 0;
+
+	switch (a) {
+		case 'A': co = 0; break;
+		case 'a': co = 0; break;
+		case 'B': co = 10; break;
+		case 'b': co = 10; break;
+		case 'C': co = 20; break;
+		case 'c': co = 20; break;
+		case 'D': co = 30; break;
+		case 'd': co = 30; break;
+		case 'E': co = 40; break;
+		case 'e': co = 40; break;
+		case 'F': co = 50; break;
+		case 'f': co = 50; break;
+		case 'G': co = 60; break;
+		case 'g': co = 60; break;
+		case 'H': co = 70; break;
+		case 'h': co = 70; break;
+		case 'I': co = 80; break;
+		case 'i': co = 80; break;
+		case 'J': co = 90; break;
+		case 'j': co = 90; break;
+		default: co = 0;
+	}
+
+	co += b;
+	co -= 1;
+
+	return co;
+}
+
 int singleplayer() {