1
我真的需要一些關於這個問題的幫助。我的項目是與像這樣的菜單創建一個數學家教程序：運行時檢查失敗＃3 - 變量沒有啓動
cout << "Select one of the following options" << endl;
cout << "-----------------------------------------" << endl;
cout << "1. [A]dd [+]" << endl;
cout << "2. [S]ubtract [-]" << endl;
cout << "3. [M]ultiply [x]" << endl;
cout << "4. [D]ivide [/]" << endl;
cout << "5. [Q]uit " << endl;
當用戶選擇增加或減少時，程序會生成2張隨機數，並拿出結果。當用戶選擇乘法或除法時，程序會再次生成第二個數字並進行數學運算。
這裏是我的代碼
#include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;
int main()
{ //Introduction to user
cout << "Welcome to Math Tutor. This program is designed to help student" << endl;
cout << "to learn how to do basic math such as addition, subtraction,..." << endl;
cout << endl;
//Declare variables
char choice;
int num1, num2, answer, useranswer, remainder, userremainder;
//Seed 2 random numbers
srand(static_cast<unsigned int>(time(0)));
num1 = rand() % 200 + 800;
num2 = 1 + rand() % 200;
do
{
//Display the menu to user and get user input
cout << "Select one of the following options" << endl;
cout << "-----------------------------------------" << endl;
cout << "1. [A]dd [+]" << endl;
cout << "2. [S]ubtract [-]" << endl;
cout << "3. [M]ultiply [x]" << endl;
cout << "4. [D]ivide [/]" << endl;
cout << "5. [Q]uit " << endl;
cin >> choice;
cout << "Your choice is: " << choice << endl;
//Respond to user's selection
switch (choice)
{
case 'A':
case 'a':
case '1':
case '+':
answer = num1 + num2;
cout << "" << num1 << endl;
cout << "+" << num2 << endl;
cout << "-----" << endl;
cout << "Enter your answer: " << useranswer;
if (answer == useranswer)
{
cout << "Congratulation, Your answer is correct" << endl;
cout << num1;
cout << "+" << num2;
cout << "------" << endl;
cout << answer;
}
else
{
cout << "You answer is not correct" << endl;
cout << "The answer is: " << answer;
}
break;
case 'S':
case 's':
case '2':
case '-':
answer = num1 - num2;
cout << num1;
cout << "-" << num2;
cout << "------" << endl;
cout << "Enter your answer: " << useranswer;
if (answer == useranswer)
{
cout << "Congratulation, Your answer is correct" << endl;
cout << num1;
cout << "-" << num2;
cout << "------" << endl;
cout << answer;
}
else
{
cout << "You answer is not correct" << endl;
cout << "The answer is: " << answer;
}
break;
//Seed the second number again
num2 = 1 + rand() % 10;
case 'M':
case 'm':
case '3':
case 'x':
answer = num1 * num2;
cout << num1;
cout << "x" << num2;
cout << "------" << endl;
cout << "Enter your answer: " << useranswer;
if (answer == useranswer)
{
cout << "Congratulation, Your answer is correct" << endl;
cout << num1;
cout << "x" << num2;
cout << "------" << endl;
cout << answer;
}
else
{
cout << "You answer is not correct" << endl;
cout << "The answer is: " << answer;
}
break;
case 'D':
case 'd':
case '4':
case '/':
answer = (num1/num2);
cout << " __________" << endl;
cout << num2 << ")" << num1 << endl;
cout << "Enter your answer, both the quotient";
cout << "and the remainder separated by a space: " << endl;
cin >> useranswer >> remainder;
if ((useranswer == answer) && (userremainder = remainder))
{
cout << "Congratulation, Your answer is correct" << endl;
cout << " __________" << endl;
cout << num2 << ")" << num1 << endl;
cout << "The answer is: " << answer << "and the remainder is: " << remainder << endl;
}
else
{
cout << "Sorry. The correct answer is: " << answer << " and the remainder is: " << remainder << endl;
}
case 'Q':
case 'q':
case '5':
cout << "Exiting the program....." << endl;
break;
//Validate user's chocie
default:
{
cout << "Please enter a valid choice" << endl;
cout << "You can enter a number from 1 to 5 or" << endl;
cout << "A letter corresponding to the calculation that you want to do" << endl;
cin >> choice;
cout << "Your choice is: " << choice;
}
}
//Pause the screen
if (choice != 5)
{
cout << endl;
cin.ignore(80, '\n');
cout << "Hit the enter key to continue....\n";
cin.get();
cout << endl;
}
} while (choice != 5);
return 0;
}