addition base case onecolumns

src/addition.c

@@ -8,5 +8,10 @@ void full_adder (int* sum, int* nextcarry, int number1, int number2, int carry)
 }
 
 unsigned int addition(unsigned int a, unsigned int b) {
-    return 0;
+    int s[1];
+    int nc[1] = {0};
+
+    full_adder(s, nc, a, b, 0);
+    
+    return (unsigned int) s[0];
 }