/**
* COMPLETE THIS FUNCTION
*
* This function should accept user input for calculating *, /, + and - operations.
* When the user does not request an exit (x or X), the function should return USER_CONTINUE,
* which is defined in hal.h. When the user requests an exit, it should return USER_EXIT.
*
* This function should do exactly the following:
* 1. Print "Enter an operator: " to the terminal, and call get_character_from_terminal()
* 2. Store the returned character from get_character_from_terminal(),
* 3. If the character is NOT a '+', '-', '*', '/', 'x' or 'X', print "Error: Invalid Operator <newline>", and
* return the value USER_CONTINUE
* 5. If the character read in is a 'x' or 'X', return the value USER_EXIT, which is defined in hal.h
* 6. Print "Enter the first operand: ", call get_integer_from_terminal(), and store the return value
* 7. Print "Enter the second operand: ", call get_integer_from_terminal(), and store the return value
* 8. Call calc_result with the parameters you stored, and save the result in a variable.
* 9. Call print_result() with the operand, operator, and result parameters. This will print the result to the
* terminal.
* 10. Return the value USER_CONTINUE, which is defined in hal.h
*
* Notes:
* 1. Do not worry about invalid operand (integer) input; assume the user always inputs valid integers
* 2. Do NOT use getchar(); use get_interger_from_terminal() and get_character_from_terminal() for input
* ONLY.
*/
int get_user_input(){
char operator;
int first_operand, second_operand, result;
printf("Enter an operator: ");
operator = get_character_from_terminal();
if(operator!='+' && operator!='-' && operator!='*' && operator!='/' && operator!='x' && operator!='X'){
printf("Error: Invalid Operator '%c'\n", operator);
return USER_CONTINUE;
}
if(operator=='x' || operator=='X'){
return USER_EXIT;
}
printf("Enter the first operand: ");
first_operand = get_integer_from_terminal();
printf("Enter the second operand: ");
second_operand = get_integer_from_terminal();
result = calc_result(first_operand, second_operand, operator);
print_result(first_operand, second_operand, operator, result);
return USER_CONTINUE;
}
int main() {
Val ret;
read();
prims();
ret = calc_result();
printf("MSP: %u\n", ret);
return 0;
}
