C program to implement menu driven calculator

Write a C program to implement menu driven calculator.

  #include <stdio.h>
  int main() {
        int operand1, operand2, ch;
        float result;
        while (1) {
                printf("#######Menu##########\n");
                printf("1. Addition\n2. Subtraction\n");
                printf("3. Division\n4. Multiplication\n");
                printf("5. Modulus\n6. Percentage\n");
                printf("7. Exit\nEnter your choice:");
                scanf("%d", &ch);

                /* get input operands from user */
                if (ch != 7) {
                        printf("Enter your operands:");
                        scanf("%d%d", &operand1, &operand2);
                }

                /* menu driven calculator */
                switch (ch) {
                        case 1:
                                result = operand1 + operand2;
                                break;
                        case 2:
                                result = operand1 - operand2;
                                break;
                        case 3:
                                result = (float)operand1 / operand2;
                                break;
                        case 4:
                                result = operand1 * operand2;
                                break;
                        case 5:
                                result = operand1 % operand2;
                                break;
                        case 6:
                                result = ((float)operand1 / 100) * operand2;
                                break;
                        case 7:
                                exit(0);
                        default:
                                printf("Please enter correct option\n");
                                break;
                }
                printf("Result: %f\n", result);
        }
  }

  Output:

  jp@jp-VirtualBox:~/$ ./a.out
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:1
  Enter your operands:100 200
  Result: 300.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:2
  Enter your operands:200 100
  Result: 100.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:6
  Enter your operands:10 100
  Result: 10.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:5
  Enter your operands:10 5
  Result: 0.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:4
  Enter your operands:128 54
  Result: 6912.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:3
  Enter your operands:100 20
  Result: 5.000000
  #######Menu##########
  1. Addition
  2. Subtraction
  3. Division
  4. Multiplication
  5. Modulus
  6. Percentage
  7. Exit
  Enter your choice:7