#include<stdio.h>
main()
{
     int i;
     char str[]="You are correct!";
     char str2[]="You are incorrect, please start over";
     char str3[]="yes";
     char str4[]="no";
     char str5[5];
     
     printf("Welcome to the quiz\n");
     printf("There are 5 questions\nplease type yes or no to the questions\n");
     printf("If you get a question wrong, start over!\n");
     
     printf("I am a girl. yes or no?\n");//question 1
     gets(str5);
     i = 0;
     if (str5 == str4){
              printf"Please start over\n");

int menu()   {
    char choice;  
   //etc.

   do   {

       system("cls");
       print your header here
       print a space or two
       print the body of your menu, here

       Get user's choice
       choice = tolower(choice);

       switch(choice)   {

         case 'a': handle_case_a(); output_from_a(); break;
         case 'b': handle_case_b(); break;
         //etc.

         default: print "Oops! I don't have a response for that choice. Please try again."

       }

   }while(choice != 'q');
   return 0;
}

 next:
     do{
     printf("Magnum opus means great work. yes or no?\n");//question 1
     gets(str5);
     } while (strcmp (str3, str5) != 0);//correct answer is yes
     puts ("Correct answer!");
     
     printf("A paragon is a self contradictory statement. yes or no?\n");//question 2
     gets(str5);
     if (strcmp (str4, str5) != 0){ //correct answer is no 
                printf("%s\n", str2);
                c = getc(stdin);
                goto next;
                }
     else{
          printf("A dystopia is a perfect world. yes or no?\n");
          }
          gets(str5);
     if (strcmp (str4, str5) != 0){ //correct answer is no 
                 printf("%s\n", str2);
                  c = getc(stdin);
                goto next;
                }

do {
    /* ... */
} while(quit == 0);