case combination

src/main/c/Calculator/calculator.c

@@ -113,6 +113,12 @@ int main() {
                 scanf("%d %d", &n, &r);
                 result = permutation(n, r);
                 printf("Permutation of %d and %d: %lf\n", n, r, result);
+                break;
+                 case 19:
+                printf("Enter n and r: ");
+                scanf("%d %d", &n, &r);
+                result = combination(n, r);
+                printf("Combination of %d and %d: %lf\n", n, r, result);
                 break;
                 case :
                 printf("Exiting...\n");