Thread: Hi, Quiz C program

I'm a first year CS student, and we have our first assignment. We have to make a quiz with a menu that will keep re-displaying
1.
2. and so on. But i can't enter 2 without choosing 1 and i cant display 3 without choosing 1 and answering 2. I've written the whole code..but the validation is getting to me. I have no idea what to do..i have used if and while loops but i keep getting blocked out. If use characters like underscore the loop i use to redisplay the menu goes crazy..so i have to find a way to fix that/ but I'm not sure how to tell the scanf to display error if character is inputted. Also, I'm thinking of using char option..as you'll see in my source code..well i used that..but default: always exits out of the loop and i cant tell it to redisplay instead of exiting.
Please help and i hope u understand what i'm trying to say lol..
Oh and however this code is crap im proud of it..its the longest code i've ever written..so no plagiarism! I have till Nov. 19 so ur help will be appreciated as soon as possible thanks.

Code:

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
/*this code is for to ask a number of questions in a quiz contest re-displaying a menu */
main() 
{
    int i ;
    int one, two, three, four ;
    int answer1 = 2 ;
    int answer2 = 9 ;
    int answer3 = 24;
    int answer4 = 100;
    char yesno ;
    int num1 ;
    int option = 3 ;
    do
    {
              
                            printf("         \n   ") ;
                            printf("      ((----))\n") ;
                            printf("      <--<\\\\_//>->\n") ;
                            printf("           | |   \n") ;
                            printf("          (===)\n") ;
                            printf("\n") ;
                            printf("    QUIZZITCH  CUP\n") ;//This is just some drawing of the prize cup that the winner would have
    
            printf("\n") ;
        
    
        printf("1. Enter the number of questions to be asked for this round of the quiz\n") ; 
        printf("2. Start quiz\n") ;
        printf("3. Display the numbers of questions that were (i) correctly (ii) incorrectly\n") ;
        printf("4. Exit Program\n") ;
        scanf("%d", &option) ;//waits for an input for 1, 2, 3 or 4
        while(option!=1 && option!=4)
        {
            printf("You must choose 1 before you can proceed to quiz\n") ;
            scanf("%d", &option) ;
            i++ ;
        }
        
       
        switch(option) //the switch option allows me to choose number of questions i want .
        {
            case 1:
            {
                
                printf("1. One question\n") ;
          
                printf("2. Two questions\n") ; 
            
                printf("3. Three questions\n") ;
           
                printf("4. Four questions\n") ; 
            
                scanf("%d", &num1) ; //this scanf to read in the option for the number questions to be answered
                
            }
            
            case 2: 
            {
                
                switch(num1)//start of option 2 using num1 as a variable of numbers of questions to be asked 
                {
                    case 1:
                    {
                        printf("What is 1+1: *\n") ;
                        scanf("%d", &one) ;
                        if(one == answer1)
                        {
                            printf("%d is Correct!\n",answer1) ;
                            
                        }
                        else
                        {
                            printf("Incorrect!Answer is: %d\n",answer1) ;
                            
                        }
                       
                        break;
                    }//end of case 1 of question 1 
                    
                    case 2:
                    {   
                
                        printf("1. what is 1+1: *\n") ;
                        scanf("%d", &one) ;
                        if(one == answer1) 
                        {
                            printf("Correct!\n") ;
                            
                        }
                        else 
                        {
                            printf("Incorrect! Answer is: %d\n", answer1) ;
                        }
            
                        printf("2. what is 3 * 3: *\n") ;
                        scanf("%d", &two) ;
                        if(two == answer2)
                        {
                            printf("Correct!\n") ;
                        }
                        else
                        {
                            printf("Incorrect! Answer is: %d\n", answer2) ;
                        }
                        break ;
                    }//end of question 2
                    //case 3
                    
                  
                    case 3:
                    { 
                          
                        printf("1. what is 1+1: *\n") ;
                        scanf("%d", &one) ;
                        if(one == answer1)
                        {
                           
                            printf("Correct!\n") ;
                        }
                        else
                        {
                            
                            printf("Incorrect! Answer is %d\n", answer1) ;
                        }
                
                        printf("2. what is 3 * 3: *\n") ;
                        scanf("%d", &two) ;
                   
                        if(two == answer2)
                        {
                          
                            printf("Correct!\n") ;
                        }
                        else
                        {
                           
                            printf("Incorrect! Answer is %d\n", answer2) ;
                        }
                        
                        printf("3. what is 4!: *\n") ;
                        scanf("%d", &three) ;
                        
                        if(three == answer3)
                        {
                            
                            printf("Correct!\n") ;
                        }
                        else
                        {
    
                            printf("Incorrect! Answer is %d\n",answer3) ;
                        }
                        
                        break ;
                    }
                    case 4:
                    {
                        printf("1. what is 1+1: *\n") ;
                        scanf("%d", &one) ;
                        if(one == answer1)
                        {
                            printf("Correct!\n") ;
                        }
                        else
                        {
                            printf("Incorrect! Answer is %d\n", answer1) ;//one
                        }
                        //two
                        printf("2. what is 3 * 3: * \n") ;
                        scanf("%d", &two) ;
                        if(two == answer2)
                        {
                            printf("Correct!\n") ;
                        }
                        else
                        {
                            printf("Incorrect! Answer is %d\n",answer2) ;
                        }
                        //two
                        printf("3. what is 4!: *\n") ;
                        scanf("%d", &three) ;
                        if(three ==answer3)
                        {
                            printf("Correct!\n") ;
                        }
                        else
                        {
                            printf("Incorrect! Answer is %d\n", answer3) ;
                        }
                        printf("4. what is 800/2*4: *\n") ;
                        scanf("%d", &four) ;
                    
                        if(four == answer4)
                        {
                            printf("Correct!\n") ;
                        }
                        else
                        {
                           printf("Incorrect! Answer is %d\n", answer4) ;
                        }
                        break ; 
                    }
                }
                break ;
            }//end of case 2 of switch(option)
        
            case 3:                  //beginning of case 3. case 3 shows how many questions the user answer correctly
            {
                if(num1==1)
                {
                    //by checking the various possibilities the user could have answered the question
                    if(one==2)
                    {
                        printf("i. You got 1 Correct!\n") ;
                    }
                    else
                    {
                        printf("ii. You got 1 Incorrect!!\n") ;
                    }
                    break ; 
                }
                if(num1==2) 
                {
                    if(one == 2 && two == 9)
                    {
                        printf("i. You got 2 Correct!\n") ;
                        printf("ii. You got none Incorrect!!\n") ;
                    }
                    else if(one == 2 && two!= 9||one!=2 && two == 9)
                    {
                        printf("i. You got 1 Correct!\n") ;
                    }
                    else
                    {
                        printf("ii. You got Everything Incorrect!!\n") ;
                    }
                    break ;
                }
                          
                if(num1==3)
                {
                    if(one != 2 && two !=9 && three == 24||one != 2 && two == 9 && three != 24||one == 2 && two != 9 && three != 24)
                    {
                        printf("i. You got 1 Correct!\n") ;
                        printf("ii. You got 2 Incorrect!!\n") ;
                        break ;
                    }
                   
                        
                    else if(one == 2 && two == 9 && three != 24||one != 2 && two == 9 && three == 24||one == 2 && two != 9 && three == 24)
                    {
                        printf("i. You got 2 Correct!\n") ;
                        printf("ii. You got 1 Incorrect!!\n") ;
                        break ;
                    }
                  
                    else if(one==2 && two==9 && three==24)
                    {
                        printf("i. You got Everything Correct\n") ;
                    }
                    else
                    {
                        printf("i. You got Everything Incorrect!!\n") ;
                    }
                    
                }
                
                if(num1==4)
                {
                    if(one == 2 && two !=9 && three != 24 && four != 100||one != 2 && two == 9 && three != 24 && four != 100||one != 2 && two != 9 && three == 24 && four!= 100||one != 2 && two != 9 && three != 24 && four==100)
                    {
                        printf("i.  You got 1 correct!\n") ;
                        printf("ii. You got 3 incorrect!!\n") ;
                        break ;
                    }
                    
                    else if(one != 2 && two != 9 && three == 24 && four == 100||one == 2 && two == 9 && three != 24 && four != 100|| one != 2 && two == 9 && three == 24 && four != 100|| one == 2 && two != 9 && three != 24 && four == 100)
                    {
                        printf("i. you got 2 correct\n") ;
                        printf("ii. you got 2 incorrect\n") ;
                        break ;
                    }
                    else if(one != 2 && two == 9 && three == 24 && four == 100||one == 2 && two != 9 && three == 24 && four == 100||one == 2 && two == 9 && three != 24 && four== 100||one == 2 && two == 9 && three == 24 && four!= 100)
                    {
                        printf("i. You got 3 Correct!\n") ;
                        printf("ii. You got 1 Incorrect!!\n") ;
                        break ;
                    }
                    else if(one == 2 && two == 9 && three == 24 && four == 100)
                    {
                        printf("i. You got everything Correct\n") ;
                        break ;
                    }
                    else
                    {
                        printf("i. you got everything Incorrect\n") ;
                        break ;
                    }
                  
                }
            }//end of switch(num1)
            case 4:
            { 
                printf("Are you sure you want to exit quiz?\n") ;
                printf("Y/N") ;
                printf("\n") ;
                scanf("%1s", &yesno) ;
                if(yesno== 'Y'|| yesno == 'y')
                {
                    exit(0) ;
                }
                clrscr() ;
                break ; /*user must input y to quit*/
            }
        
            default: 
            {
                printf("Can't you follow simple instructions?\n") ;
                
                break ; 
            }
             
        }
    }while(option==1 || option==2 ||option==3 || option == 4) ;
    
    getch() ;
}