What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
template <typename T>
class A {
T_v;
public:
A() {}
A(T v): _v(v){}
T getV() { return _v; }
void add(T a) { _v+=a; }
template <class U>
U get(U a) {
return (U)(_v);
}
};
int main()
{
A<int> a(1);
a.add(10);
cout.setf( ios::showpoint);
cout << a.getV() << " " << a.get(1.0)<<endl;
return 0;
}
What will happen when you attempt to compile and run the following code?
#include <iostream>
#include <set>
#include <vector>
using namespace std;
int main(){
int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 0 };
vector<int>v(t, t+10);
set<int> s1(v.begin(),v.end());
s1.insert(v.begin(),v.end());
pair<set<int>::iterator,set<int>::iterator> range;
range = s1.equal_range(6);
cout<<*range.first<<" "<<*range.second<<endl;
return 0;
}
The output will be:
What happens when you attempt to compile and run the following code?
#include <vector>
#include <set>
#include <iostream>
#include <algorithm>
using namespace std;
template<class T>struct Out {
ostream & out;
Out(ostream & o): out(o){}
void operator() (const T & val ) { out<<val<<" "; } };
template <typename T> struct Sequence {
T start; T step;
Sequence(T start, T step):start(start), step(step){}
T operator()() { T v = start; start+=step; return v; } };
bool Less(float a, float b) { return int(a)<int(b);}
int main() {
float t[]={2.28, 1.66, 1.32, 3.94, 3.64, 2.3, 2.98, 1.96, 2.62, 1.13};
vector<float> v1; v1.assign(t, t+10);
stable_sort(v1.begin(), v1.end(), Less);
for_each(v1.begin(), v1.end(), Out<float>(cout));cout<<endl;
return 0;
}
Program outputs:
What happens when you attempt to compile and run the following code?
#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);
};
template <class T>
ostream & operator<<(ostream & c, const A<T> & v) {
c<<v._v;return c; }
int main()
{
A<int>a(10);
cout<<a<<endl;
return 0;
}
What happens when you attempt to compile and run the following code?
# include <vector>
# 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};
vector<B> v1(t, t+10);
sort(v1.begin(), v1.end());
for_each(v1.begin(), v1.end(), Out<B>(cout));cout<<endl;
return 0;
}
Program outputs:
