最新なC++ Institute CPA問題集（220題）、真実試験の問題を全部にカバー！

質問 1：
What is the output of the program?
#include <iostream> #include <string>
using namespace std;
struct t { int tab[2];
};
class First
{
struct t u;
public:
First() {
u.tab[0] = 1;
u.tab[1] = 0;
}
void Print(){
cout << u.tab[0] << " " << u.tab[1];
}
};
int main()
{
First t;
t.Print();
}
A. It prints: 0 0
B. It prints: 1 0
C. It prints: 1 1
D. It prints: 2 2
正解：B

質問 2：
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class A {
public:
int x;
A() { x=0;}
};
class B : protected A {
public:
int y;
using A::x;
B(int y) {this->y = y;}
void Print() { cout << x << y; }
};
int main () {
B b(5);
b.Print();
return 0;
}
A. It prints: 15
B. It prints: 0
C. It prints: 05
D. It prints: 5
正解：C

質問 3：
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class A
{
public:
virtual void Print(){ cout<<"A";}
};
class B:public A
{
public:
virtual void Print(){ cout<< "B";}
};
int main()
{
A *obj;
A ob1;
obj = &ob1;
obj->Print();
B ob2;
obj = &ob2;
obj->Print();
}
A. It prints: BA
B. It prints: AA
C. It prints: AB
D. It prints: BB
正解：C

質問 4：
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
const int size = 3;
class A {
public:
string name;
A() { name = "Bob";}
A(string s) { name = s;}
A(A &a) { name = a.name;}
};
class B : public A {
public:
B() { }
B(string s) : A(s) { }
void Print() {
cout << name;
}
};
int main () {
B b1("Alan");
b1.Print();
return 0;
}
A. It prints: Alan
B. It prints: 111Alan
C. It prints: 0
D. It prints: Bob
正解：A

質問 5：
Given:
#include <iostream>
#include <exception>
using namespace std;
int main () {
try
{
int * myarray= new int[1000];
}
catch (bad_alloc&)
{ cout << "Error allocating memory"; } catch (exception& e) { cout << "Standard exception"; } catch (...) { cout << "Unknown exception"; } return 0; }
What will happen if we use the operator "new" and the memory cannot be allocated?
A. It prints: Standard exception
B. It prints: Unknown exception
C. Compilation error
D. It prints: Error allocating memory
正解：D

質問 6：
What happens when you attempt to compile and run the following code?
#include <iostream> #include <string>
using namespace std;
class A {
public:
A() { cout << "A no parameters";}
A(string s) { cout << "A string parameter";}
A(A &a) { cout << "A object A parameter";}
};
class B : public A {
public:
B() { cout << "B no parameters";}
B(string s) { cout << "B string parameter";}
B(int s) { cout << "B int parameter";}
};
int main () {
A a2("Test");
B b1(10);
B b2(b1);
return 0;
}
A. It prints: A no parametersA no parametersB string parameter
B. It prints: A string parameterA no parametersB int parameterA object A parameter
C. It prints: A no parametersA no parameters
D. It prints: A no parametersB string parameter
正解：B

質問 7：
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int main()
{
union un
{
int x;
char c;
};
union un u1 = {10};
union un u2 = {'a'};
union un u3 = {20, 'a'};
cout<<u1.x;
cout<<u2.c;
cout<<u3.c;
return 0;
}
A. It prints: 1a
B. Compilation error
C. It prints: 10a20a
D. It prints: 10aa
正解：B

質問 8：
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int op(int x, int y);
int main()
{
int i=2, j=2, k;
float f=0.3;
k = op(i, j);
cout<< k << "," << op(1, f);
return 0;
}
int op(int x, int y)
{
return x+y;
}
A. It prints: 4,0
B. It prints: 4,1
C. It prints: 0,4
D. It prints: 4,0.7
正解：B