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C++ Certified Associate Programmer Questions 91–95 (page: 20)

Point out an error in the program.

#include <iostream>
using namespace std;
int main()
{
char s1[] = "Hello";
char s2[] = "world";
char *const ptr = s1;
*ptr = 'a';
ptr = s2;
return 0;
}

What happens when you attempt to compile and run the following code?

#include <iostream>

using namespace std;


int main()
{
int x=20;
int *ptr;
ptr = &x;
cout<<*ptr;
return 0;
}

What happens when you attempt to compile and run the following code?

#include <iostream>

using namespace std;

int main()
{
int x=0;
int *ptr;


ptr = &x;
cout<<x<<" "<<*ptr;


return 0;
}

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?

What happens when you attempt to compile and run the following code?

#include <iostream>

using namespace std;


struct {
int x;
char c;
union {
float f;
int i;
};
} s;


int main (int argc, const char * argv[])
{
s.x=10;
s.i=0;
cout << s.i << " " << s.x;
}