C++ Code (Other (Not Listed) Sample)

#include <iostream> using namespace std; /* Function name: printDigit Parameters: A single integer parameter Returns: 0 if the function return is success -1 if the function encountered an error (incorrect input for example). */ //Function prototypes int printDigit(int); int main() { int num; int ret; //Test Cases for (int x = -1; x < 102; x++) { num = x; ret = printDigit(num); cout << "Result = " << ret << endl; } return 0; } /* Function name: printDigit Parameters: A single integer parameter Returns: 0 if the function return is success -1 if the function encountered an error (incorrect input for example). */ int printDigit(int num) { //Initialize variables string ones[10] = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}; string teens[10] = {"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"}; string tens[9] = {"twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"}; //Check for valid input if (num < 0 || num > 100) { return -1; } //Check for specific numbers else if (num == 0) { cout << "Zero" << endl; } else if (num == 10) { cout << "Ten" << endl; } else if (num == 100) { cout << "One Hundred" << endl; } //Check for number between 1 and 9 inclusive else if (num < 10) { cout << ones[num] << endl; } //Check for teens else if (num > 9 && num < 20) { cout << teens[num - 10] << endl; } //Check for numbers between 20 and 99 inclusive else if (num > 19 && num < 100) { cout << tens[num / 10 - 2]; if (num % 10 != 0) { cout << "-" << ones[num % 10]; } cout << endl; } cout << "There are " << num / 10 << " tens." << endl; return 0; } Explanation 1. int printDigit(int); This line declares a function called printDigit that takes a single integer parameter. 2. int num; This line declares a variable called num of type int. 3. int ret; This line declares a variable called ret of type int. 4. for (int x = -1; x < 102; x++) This line creates a for loop that iterates from -1 to 102. 5. num = x; This line assigns the value of x to the variable num. 6. ret = printDigit(num); This line calls the function printDigit with the parameter num and assigns the return value to the variable ret. 7. cout << "Result = " << ret << endl; This line prints the string "Result = " followed by the value of the variable ret and a newline. 8. return 0; This line returns the value 0 from the main function. 9. } This line ends the main function. 10. int printDigit(int num) This line begins the definition of the function printDigit. 11. { This line begins the body of the function printDigit. 12. string ones[10] = {"zero", "one", "two", "three", This line declares an array of strings called ones with 10 elements. The first element is "zero", the second element is "one", and so on. 13. "four", "five", "six", "seven", "eight", "nine"}; This line continues the declaration of the array of strings called ones. The fourth element is "four", the fifth element is "five", and so on. 14. 15. string teens[10] = {"ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", This line declares an array of strings called teens with 10 elements. The first element is "ten", the second element is "eleven", and so on. 16. "sixteen", "seventeen", "eighteen", "nineteen"}; This line continues the declaration of the array of strings called teens. The seventh element is "sixteen", the eighth element is "seventeen", and so on. 17. 18. string tens[9] = {"twenty", "thirty", "forty", "fifty", "sixty", "seventy", This line declares an array of strings called tens with 9 elements. The first element is "twenty", the second element is "thirty", and so on. 19. "eighty", "ninety"}; This line continues the declaration of the array of strings called tens. The eighth element is "eighty", the ninth element is "ninety". 20. 21. //Check for valid input This line is a comment that says, "Check for valid input". 22. if (num < 0 || num > 100) This line checks if the value of the variable num is less than 0 or greater than 100. 23. { This line begins the body of the if statement. 24. return -1; This line returns the value -1 from the function printDigit. 25. } This line ends the body of the if statement. 26. //Check for specific numbers This line is a comment that says, "Check for specific numbers". 27. else if (num == 0) This line checks if the value of the variable num is equal to 0. 28. { This line begins with the body of the else if statement. 29. cout << "Zero" << endl; This line prints the string "Zero" followed by a newline. 30. } This line ends the body of the else if statement. 31. else if (num == 10) This line checks if the value of the variable num is equal to 10. 32. { This line begins the body of the else if statement. 33. cout << "Ten" << endl; This line prints the string "Ten" followed by a newline. 34. } This line ends the body of the else if statement. 35. else if (num == 100) This line checks if the value of the variable num is equal to 100. 36. { This line begins the body of the else if statement. 37. cout << "One Hundred" << endl; This line ...