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CPP 無料問題集「C++ Institute C++ Certified Professional Programmer」

ページ: 1 / 15
トータル 230 問

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質問 1

What happens when you attempt to compile and run the following code?
# include <iostream>
# include <set>
# include <vector>
using namespace std;
template<class T> void print(T start, T end) {
while (start != end) {
std::cout << *start << " "; start++;
}
}
int main(){
vector<int>v;
multiset<int> s;
for(int i=10; i>0; i??) {
v.push_back(i); s.push_back(i);
}
print(v.begin(), v.end()); print(s.begin(), s.end());cout<<endl;
return 0;
}

（A）compilation error

（B）program outputs: 10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1

（C）program outputs: 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10

（D）program outputs: 10 9 8 7 6 5 4 3 2 1 and unpredictable sequence of numbers range 1 to 10

正解：A 解答を投票する

質問 2

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
using namespace std;
void myfunction(int i) { cout << " " << i;
}
struct sequence {
int val,inc;
sequence(int s, int i):val(s),inc(i){}
int operator()(){
int r = val; val += inc;
return r;
}
};
int main() {
vector<int> v1(10);
fill(v1.begin(), v1.end(), sequence(1,1));
for_each(v1.begin(), v1.end(), myfunction);
return 0;
}
Program outputs:

（A）1 2 3 4 5 6 7 8 9 10

（B）compilation error

（C）10

（D）0 0 0 0 0 0 0 0 0 0

正解：B 解答を投票する

質問 3

What happens when you attempt to compile and run the following code?
# include <iostream>
# include <deque>
# include <list>
# include <queue>
# include <vector>
using namespace std;
int main()
{
int t[] ={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
deque<int> mydeck(t, t+10);list<int> mylist(t,t+10);
queue<int> first;
queue<int> second(mydeck);
queue<int> third(second);
queue<int, list<int> > fourth(mylist);
mylist.clear();third.clear();
cout<<third.size()<< " "<<mydeck.size()<< endl;
cout<<fourth.size()<< " "<<mylist.size()<<endl;
return 0;
}

（A）program outputs: 0 0
0 0

（B）compilation error

（C）program outputs: 10 10
1 0 10

（D）program outputs: 10 0
10 0

（E）program outputs: 10 0
0 10

正解：B 解答を投票する

質問 4

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
#include <set>
using namespace std;
void myfunction(int i) {
cout << " " << i;
}
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
set<int> s1(t, t+10);
vector<int> v1(s1.rbegin(), s1.rend());
swap_ranges(s1.begin(), s1.end(), v1.begin());
for_each(v1.begin(), v1.end(), myfunction);
for_each(s1.begin(), s1.end(), myfunction);
return 0;
}
Program outputs:

（A）10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10

（B）compilation error

（C）1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10

（D）10 9 8 7 6 5 4 3 2 1 10 9 8 7 6 5 4 3 2 1

（E）1 2 3 4 5 6 7 8 9 10 10 9 8 7 6 5 4 3 2 1

正解：B 解答を投票する

質問 5

What happens when you attempt to compile and run the following code?
# include <vector>
# include <iostream>
# include <algorithm>
# include <functional>
using namespace std;
class B { int val;
public:
B(int v=0):val(v){}
int getV() const {return val;}
operator int () const { return val;} };
ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;} template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
B t[]={3,2,4,1,5,6,10,8,7,9};
vector v1(t, t+10);
transform(v1.begin(), v1.end(), v1.begin(), bind2nd(plus(), 1));
for_each(v1.rbegin(), v1.rend(), Out(cout));cout<<endl;
return 0;
}
Program outputs:

（A）compilation error

（B）4 3 5 2 6 7 11 9 8 10

（C）3 2 4 1 5 6 10 8 7 9

（D）10 8 9 11 7 6 2 5 3 4

（E）9 7 8 10 6 5 1 4 2 3

正解：D 解答を投票する

質問 6

What will happen when you attempt to compile and run the code below, assuming that file test.in contains the following sequence: 1 2 3?
#include <iostream>
#include <fstream>
#include <string>
#include <list>
#include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) {out<<val<<" "; } };
int main () {
ifstream f("test.in");
list<int> l;
for( ; !f.fail() ; ) {
int i;
f>>i;
l.push_back(i);
}
f.close();
for_each(l.begin(), l.end(), Out<int>(cout));
return 0;
}
Programwill output:

（A）compilation error

（B）program runs forever without output

（C）no output

（D）1 2 3

（E）1 2 3 3

正解：E 解答を投票する

質問 7

What happens when you attempt to compile and run the following code?
# include <list>
# include <iostream>
# include <deque>
using namespace std;
template<class T> void print(T start, T end) {
while (start != end) {
std::cout << *start << " "; start++;
}
}
class A {
int a;
public:
A(int a):a(a){}
operator int () const { return a;}int getA() const { return a;}
};
struct R {
int val;
R(int v):val(v){}
bool operator ()(const A & a) { return a>val;} };
int main() {
int t1[] ={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
list<A> l1(t1, t1 + 10);
R r(4);l1.remove_if(r);
print(l1.begin(), l1.end()); cout<<endl;
return 0;
}

（A）program outputs: 6 7 8 9 10

（B）program outputs: 5 6 7 8 9 10

（C）program outputs: 1 2 3 4

（D）program outputs: 1 2 3 4 5

正解：C 解答を投票する

質問 8

What happens when you attempt to compile and run the following code?
# include <iostream>
# include <algorithm>
#include <map>
using namespace std;
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
map<int, int> m;
for(int i=0; i < 10; i++) {
m[i]=t[i];
}
map<int, int>::iterator it = find(m.begin(), m.end(), 5);
cout<<it?>first;
return 0;
}
Program outputs:

（A）compilation error

（B）5

（C）10

（D）4

正解：A 解答を投票する

質問 9

What happens when you attempt to compile and run the following code?
# include <vector>
# include <iostream>
# include <algorithm>
using namespace std;
void print(int v) {
cout<<v<<" ";
}
struct Sequence {
int start;
Sequence(int start):start(start){}
int operator()() {
return start++;
}
};
int main() {
vector<int> v1(10);
generate_n(v1.begin(), 10, Sequence(1));
for_each(v1.begin(), v1.end(), print);
cout<<endl;
return 0;
}
Program outputs:

（A）1 2 3 4 5 6 7 8 9 10

（B）compilation error

（C）no output

（D）0 0 0 0 0 0 0 0 0 0

正解：A 解答を投票する

質問 10

What happens when you attempt to compile and run the following code?
# include <deque>
# include <iostream>
# include <algorithm>
# include <functional>
using namespace std;
class B { int val;
public:
B(int v):val(v){}
int getV() const {return val;} bool operator > (const B & v) const { return val>v.val;} }; ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;} template<class T>struct Out {
ostream & out; Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t[]={20, 30, 10, 20, 30, 10, 20, 30, 10, 20};
deque d1(t, t+10);
sort(d1.begin(), d1.end(), greater());
pair<deque ::iterator, deque::iterator > result = equal_range(d1.begin(), d1.end(),
B(20), greater());
for_each(result.first, result.second, Out(cout));cout<<endl;
return 0;
}
Program outputs:

（A）30 30 30 20 20 20 20 10 10 10

（B）20 20 20 20

（C）30 20 20 20 10

（D）30 20 20 20 20 10

（E）20 20 20 20 10

正解：B 解答を投票する

質問 11

What happens when you attempt to compile and run the following code? Choose all possible answers.
#include <iostream>
using namespace std;
template <class T>
class A {
T_v;
public:
A() {}
A(T v): _v(v){}
friend ostream & operator<<(ostream & c, const A<T> & v) {
c<<v._v;return c;
}
};
int main()
{
A<int>a(10);
cout<<a<<endl;
return 0;
}

（A）program will compile

（B）program will run without output

（C）program will not compile

（D）program will display:10

正解：A、D 解答を投票する

質問 12

What will happen when you attempt to compile and run the following code? Choose all possible answers.
#include <iostream>
using namespace std;
class B {};
template <typename T>
class A {
T_v;
public:
A() {}
A(T v): _v(v){}
T getV() { return _v; }
void add(T a) { _v+=a; }
};
int main()
{
A<int> a(1);
Ab;
a.add(10);
cout << a.getV() <<endl;
return 0;
}

（A）program will compile

（B）program will cause runtime exception

（C）program will not compile

（D）program will display:11

正解：A、D 解答を投票する

質問 13

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
using namespace std;
class A {
int a;
public:
A(int a):a(a) {}
int getA() const { return a;} void setA(int a){ this?>a = a;}
bool operator < ( const A & b) const { return a<b.a;}
};
struct display { void operator() (const A & a) {cout << " " << a.getA();} }; struct add10
{
void operator() (A & a) { a.setA(a.getA()+10) ;}
};
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector<A> v1(t, t + 10);
set<A> s1(t, t + 10);
for_each(v1.begin(), v1.end(), add10()); for_each(v1.begin(), v1.end(), display()); for_each(s1.begin(), s1.end(), add10()); for_each(s1.begin(), s1.end(), display()); return 0;
}

（A）compilation error

（B）program outputs: 10 5 9 6 2 4 7 8 3 1 1 2 3 4 5 6 7 8 9 10

（C）program outputs: 20 15 19 16 12 14 17 18 13 11 1 2 3 4 5 6 7 8 9 10

（D）program outputs: 20 15 19 16 12 14 17 18 13 11 11 12 13 14 15 16 17 18 19 20

正解：A 解答を投票する

質問 14

What happens when you attempt to compile and run the following code?
# include <deque>
# include <iostream>
# include <algorithm>
using namespace std;
class B { int val;
public:
B(int v):val(v){}
int getV() const {return val;} bool operator < (const B & v) const { return val<v.val;} }; ostream & operator <<(ostream & out, const B & v) { out<<v.getV(); return out;} template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
int main() {
int t[]={8, 10, 5, 1, 4, 6, 2, 7, 9, 3};
deque d1(t, t+10);
sort(d1.begin(), d1.end());
deque::iterator it = upper_bound(d1.begin(), d1.end(), B(4));
for_each(it, d1.end(), Out(cout)); cout<<endl;
return 0;
}
Program outputs:

（A）4 5 6 7 8 9 10

（B）5 6 7 8 9 10

（C）6 7 8 9 10

（D）1 2 3 4 5

（E）1 2 3 4

正解：B 解答を投票する

質問 15

What happens when you attempt to compile and run the following code?
#include <vector>
#include <iostream>
int main ()
{
int t[]={1,2,3,4,5};
std::vector<int>v1(t,t+5);
std::vector<int>v2(v1);
v1.resize(10);
v2.reserve(10);
std::vector<int>::iterator i = v1.begin();int ii = 0;
while (i != v1.end()) { std::cout<<i[ii]<<" ";ii??;i++; }
i = v2.begin();ii=0;
while (i != v2.end()) { std::cout<<i[ii]<<" ";ii??;i++; }
return 0;
}

（A）compilation error

（B）program outputs 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5

（C）program outputs 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

（D）program outputs 1 2 3 4 5 0 0 0 0 0 1 2 3 4 5 0 0 0 0 0

正解：C 解答を投票する

質問 16

What happens when you attempt to compile and run the following code?
# include <iostream>
# include <map>
# include <vector>
# include <sstream>
# include <string>
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector<int> v(t, t+10);
map<int,string> m;
for(vector<int>::iterator i=v.begin(); i!=v.end(); i++) {
stringstream s; s<<*i<<*i; m.insert(pair<int,string>(*i,s.str()));
}
for(map<int, string>::iterator i=m.begin();i!= m.end(); i++) {
cout<<*i<<" ";
}
return 0;
}

（A）compilation error

（B）program outputs: 3 4 2 1 6 5 7 9 8 0

（C）program outputs: 0 00 1 11 2 22 3 33 4 44 5 55 6 66 7 77 8 88 9 99

（D）program outputs: 0 1 2 3 4 5 6 7 8 9

（E）program outputs: 00 11 22 33 44 55 66 77 88 99

正解：A 解答を投票する

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