Where does keyword ‘friend’ should be placed?
Pick out the correct statement.
What is the output of this program?
1.
#include
2.
using namespace std;
3.
class sample
4.
{
5.
private:
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int a, b;
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public:
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void test()
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{
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a = 100;
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b = 200;
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}
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friend int compute(sample e1);
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};
15.
int compute(sample e1)
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{
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return int(e1.a + e1.b) - 5;
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}
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int main()
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{
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sample e;
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e.test();
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cout << compute(e);
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return 0;
25.
}
What is the output of this program?
1.
#include
2.
using namespace std;
3.
class base
4.
{
5.
int val1, val2;
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public:
7.
int get()
8.
{
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val1 = 100;
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val2 = 300;
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}
12.
friend float mean(base ob);
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};
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float mean(base ob)
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{
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return float(ob.val1 + ob.val2) / 2;
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}
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int main()
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{
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base obj;
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obj.get();
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cout << mean(obj);
23.
return 0;
24.
}
What is the output of this program?
1.
#include
2.
using namespace std;
3.
class sample;
4.
class sample1
5.
{
6.
int width, height;
7.
public:
8.
int area ()
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{
10.
return (width * height);}
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void convert (sample a);
12.
};
13.
class sample
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{
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private:
16.
int side;
17.
public:
18.
void set_side (int a)
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{
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side = a;
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}
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friend class sample1;
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};
24.
void sample1::convert (sample a)
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{
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width = a.side;
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height = a.side;
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}
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int main ()
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{
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sample sqr;
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sample1 rect;
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sqr.set_side(6);
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rect.convert(sqr);
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cout << rect.area();
36.
return 0;
37.
}