Thread: My getline function is skipped whenver I use case 10.

Indentation is important, but it's not the only thing you need. Your else statements don't have appropriate curly brackets to indicate code blocks. As a result, only one line after them is included.

you should use autoformating tool like astyle

Code:

#include <iostream>
#include <cstring>

using namespace std;

int main ()
{
    char a;
    char fill_in_the_blank[50];
    char correct_answer_for_Q10[]="Connecticut Compromise";
    char a_correct_answer_for_Q10[]="connecticut compromise";
    char b_correct_answer_for_Q10[]="Connecticut compromise";
    int x;
    int attempt1=0;
    int attempt2=0;
    int attempt3=0;
    int attempt4=0;
    int attempt5=0;
    int attempt6=0;
    int attempt7=0;
    int attempt8=0;
    int attempt9=0;
    int attempt10=0;
    int score=0;

    cout<<"\nWELCOME TO THE AMERICAN HISTORY INTERACTIVE QUIZ PROGRAM!!!\n\n";
    cout<<"\nTHIS SERIES IS ON THE U.S. CONSTITUTION.\n\n";
    cout<<"\nTHERE ARE 20 QUESTIONS IN TOTAL.\n\n";

    do {
        cout<<"\nPLEASE ENTER A NUMBER IN THE RANGE 1-20,INCLUSIVE.\n\n";
        cout<<"\nPLEASE ENTER A NUMBER OUTSIDE THIS RANGE TO QUIT THIS PROGRAM.\n\n";
        cin>>x;

        switch (x)
        {
        case 1:
            if (attempt1>0)
                cout<<"\nThis question has been selected. Please choose another question other than Q1.\n";
            if (attempt1>0)
                break;
            else
                cout<<"\nQ1.What is the significance of Madison vs. Marbury?\n";
            cout<<"a. The U.S. Supreme Court asserted its right to judicial review and transformed the power relationships between the executive, legislative, and the judicial branches.\n";
            cout<<"b. The Judiciary Act of 1789 was found to be partially unconstitutional.\n";
            cout<<"c. Marbury did not receive his political appointment in time.\n";
            cout<<"d. Marbury never became a Justice of the Peace in the District of Columbia.\n";
            cout<<"Answer:"<<endl;
            cin>>a;
            if (a=='a')
                cout<<"\nCORRECT!\n\n";
            if (a=='a')
                ++score;
            if (a=='a')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is a."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt1;
            break;

        case 2:
            if (attempt2>0)
                cout<<"\nThis question has been selected. Please choose another question aside from Q1.\n";
            if (attempt2>0)
                break;
            else
                cout<<"\nQ2.Which U.S. Constitutional amendment was ratified to ensure American women's voting rights?\n";
            cout<<"a. 17th\n";
            cout<<"b. 18th\n";
            cout<<"c. 19th\n";
            cout<<"d. 22nd\n";
            cin>>a;
            if (a=='c')
                cout<<"CORRECT!\n\n";
            if (a=='c')
                ++score;
            if (a=='c')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is c."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt2;
            break;

        case 3:
            if (attempt3>0)
                cout<<"This question has been selected.\n";
            if (attempt3>0)
                break;
            else
                cout<<"\nQ3.Which U.S. Constitutional amendment was ratified to mandate the direct election of U.S. Senators?\n";
            cout<<"a. 16th\n";
            cout<<"b. 17th\n";
            cout<<"c. 18th\n";
            cout<<"d. 19th\n";
            cin>>a;
            if (a=='b')
                cout<<"CORRECT!\n\n";
            if (a=='b')
                ++score;
            if (a=='b')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is b."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt3;

        case 4:
            if (attempt4>0)
                cout<<"This question has been selected.\n";
            if (attempt4>0)
                break;
            else
                cout<<"\nQ4.Which U.S. Constitutional amendment was ratified to ensure American women's voting rights?\n";
            cout<<"a. 17th\n";
            cout<<"b. 18th\n";
            cout<<"c. 19th\n";
            cout<<"d. 22nd\n";
            cin>>a;
            if (a=='c')
                cout<<"CORRECT!\n\n";
            if (a=='c')
                ++score;
            if (a=='c')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is c."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt4;
            break;

        case 5:
            if (attempt5>0)
                cout<<"This question has been selected.\n";
            if (attempt5>0)
                break;
            else
                cout<<"\nQ5.Who were the Anti-Federalists?\n";
            cout<<"a. They opposed demands for a strong central government and instead supported strong states' rights and a federation of states.\n";
            cout<<"b. The Anti-Federalists conditioned approval of the drafted U.S. Constitution on the presence of a bill of rights.\n";
            cout<<"c. a and b.\n";
            cout<<"d. None of the above.\n";
            cin>>a;
            if (a=='c')
                cout<<"CORRECT!\n\n";
            if (a=='c')
                ++score;
            if (a=='c')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is c."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt5;
            break;

        case 6:
            if (attempt6>0)
                cout<<"This question has been selected.\n";
            if (attempt6>0)
                break;
            else
                cout<<"\nQ6.What were some of the major weaknesses of the Articles of Confederation?\n";
            cout<<"a. The U.S. Congress could not lay and collect taxes.\n";
            cout<<"b. There was no national executive branch to enforce enacted legislation.\n";
            cout<<"c. The U.S. Congress could not regulate interstate commerce.\n";
            cout<<"d. All of the above.\n";
            cin>>a;
            if (a=='d')
                cout<<"CORRECT!\n\n";
            if (a=='d')
                ++score;
            if (a=='d')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is d."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt6;
            break;

        case 7:
            if (attempt7>0)
                cout<<"This question has been selected.\n";
            if (attempt7>0)
                break;
            else
                cout<<"\nQ7.Which amendment is the only one that has been repealed in American history?\n";
            cout<<"a. 15th\n";
            cout<<"b. 16th\n";
            cout<<"c. 17th\n";
            cout<<"d. 18th\n";
            cin>>a;
            if (a=='d')
                cout<<"CORRECT!\n\n";
            if (a=='d')
                ++score;
            if (a=='d')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is d."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt7;
            break;

        case 8:
            if (attempt8>0)
                cout<<"This question has been selected.\n";
            if (attempt8>0)
                break;
            else
                cout<<"\nQ8.What are the provisions of the Fifth Amendment?\n";
            cout<<"I. Due process; freedom from self-incrimination; trials must be preceded by grand jury indictments;\n";
            cout<<"II. Eminent domain\n";
            cout<<"III. Double jeopardy\n";
            cout<<"a. I only \n";
            cout<<"b. II only \n";
            cout<<"c. III only\n";
            cout<<"d. I, II\n";
            cout<<"e. I, II, III\n";
            cin>>a;
            if (a=='e')
                cout<<"CORRECT!\n\n";
            if (a=='e')
                ++score;
            if (a=='e')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is e."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt8;
            break;

        case 9:
            if (attempt9>0)
                cout<<"This question has been selected.\n";
            if (attempt9>0)
                break;
            cout<<"\nQ9.A constitutional amendment needs the approval _______ of the state legislatures or _______ of the state ratifying conventions in order to ensure passage.\n";
            cout<<"a. 2/3;4/5\n";
            cout<<"b. 4/5;3/4\n";
            cout<<"c. 3/4;3/4\n";
            cout<<"d. none of the above\n";
            cin>>a;
            if (a=='e')
                cout<<"CORRECT!\n\n";
            if (a=='e')
                ++score;
            if (a=='e')
                cout<<"Your score is now: "<<score<<"\n";
            else
                cout<<"The correct answer is e."<<endl;
            cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            ++attempt9;

        case 10:
            if (attempt10>0)
                cout<<"This question has been selected.\n";
            if (attempt10>0)
                break;

            cout<<"\nQ10.What was the plan that created a bicameral Congress with the House of Representatives based on proportional representation and the Senate based on equality?.\n";
            cout<<"Enter the answer:";
            cin.getline(fill_in_the_blank,50);

            if (strcmp(fill_in_the_blank,correct_answer_for_Q10)==0 || strcmp(fill_in_the_blank,a_correct_answer_for_Q10)==0 || strcmp(fill_in_the_blank,b_correct_answer_for_Q10)==0)
            {
                cout<<"CORRECT!"<<endl;
                ++score;
                cout<<"Your score is now: "<<score<<endl;
            }
            else
            {
                cout<<"The correct answer is the Connecticut Compromise."<<endl<<endl;
                cout<<"INCORRECT!\n\n"<<"Your score is now: "<<score<<"\n";
            }
            ++attempt10;
            break;
        }

    } while (x>0 && x<21);

    cout<<"\nThanks for playing!\n\n"<<"Your total score is "<<score<<" out of 10."<<endl;

    return 0;
}

and splitting long function in smaller onces could also help to analyze the code