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• You should really consider making functions for each mathematical operation and keep the main() simple.

As an example:

float addition(float num1, float num2){

    return num1 + num2;
}

//or

void addition(float num1, float num2){

    float result = num1 + num2;
    printf("%0.2f", result);

}

In the second example, you create and destroy result each function call.

• Consider asking the user if they would like to return to the menu, in case they want to do multiple calculations.

• You don't need multiple printf statements for the menu options. Simply continuing as such is needed:

  printf("1. Addition\n2. Subtraction\n3. Multiplication\n4. Division\n\n");