Datatype and placeholders reajusted

src/main/c/Calculator/calculator.c

@@ -2,10 +2,10 @@
 
 // Function prototypes
 void displayMenu();
-double add(int num1, int num2);
-double subtract(int num1, int num2);
-double multiply(int num1, int num2);
-double divide(int num1, int num2);
+double add(double num1, double num2);
+double subtract(double num1, double num2);
+double multiply(double num1, double num2);
+double divide(double num1, double num2);
 double exponent(double base, double exponent);
 double modulus(double num1, double num2);
 double logarithm(double num);
@@ -30,32 +30,32 @@ int main() {
         printf("Enter your choice: ");
         scanf("%d", &choice);
        switch (choice) {
-       case 1:
+                case 1:
                 printf("Enter two numbers: ");
-                scanf("%d %d", &num1, &num2);
+                scanf("%lf %lf", &num1, &num2);
                 result = add(num1, num2);
-                printf("Result: %d\n", result);
+                printf("Result: %lf\n", result);
                 break;
-              case 2:
+                case 2:
                 printf("Enter two numbers: ");
-                scanf("%d %d", &num1, &num2);
+                scanf("%lf %lf", &num1, &num2);
                 result = subtract(num1, num2);
-                printf("Result: %d\n", result);
+                printf("Result: %lf\n", result);
                 break;
-                      case 3:
-                printf("#Enter two numbers: ");
-                scanf("%d %d", &num1, &num2);
+                case 3:
+                printf("Enter two numbers: ");
+                scanf("%lf %lf", &num1, &num2);
                 result = multiply(num1, num2);
-                printf("Result: %d\n", result);
+                printf("Result: %lf\n", result);
                 break;
                 case 4:
                 printf("Enter two numbers: ");
-                scanf("%d %d", &num1, &num2);
+                scanf("%lf %lf", &num1, &num2);
                 if (num2 == 0) {
                     printf("Error: Division by zero\n");
                 } else {
                     result = divide(num1, num2);
-                    printf("Result: %d\n", result);
+                    printf("Result: %lf\n", result);
                 }
                 break;
                 case 5:
@@ -118,25 +118,37 @@ int main() {
                 result = permutation(n, r);
                 printf("Permutation of %d and %d: %lf\n", n, r, result);
                 break;
-                 case 19:
+                 case 15:
                 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 11:
+                 case 16:
                 printf("Enter a number: ");
                 scanf("%lf", &num1);
                 result = cube(num1);
                 printf("Result: %lf\n", result);
                 break;
-                 case 12:
+                 case 17:
                 printf("Enter a number: ");
                 scanf("%lf", &num1);
                 result = cubeRoot(num1);
                 printf("Result: %lf\n", result);
                 break;
-                case :
+                 case 18:
+                printf("Enter a number: ");
+                scanf("%lf", &num1);
+                result = factorial(num1);
+                printf("Result: %lf\n", result);
+                break;
+                 case 19:
+                printf("Enter base and exponent: ");
+                scanf("%lf %lf", &num1, &num2);
+                result = power(num1, num2);
+                printf("Result: %lf\n", result);
+                break;
+                case 20:
                 printf("Exiting...\n");
                 break;
             default: