Answer Posted / achal ubbott

Here is an example of dangling pointer.

char* p = new char;// allocate a byte from heap section.
delete p ; // deallocation.

*p = 44 ; // using a dangling pointer.

What is polymorphism and its type in c++?

1071

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Do the names of parameters have to agree in the prototype, definition, and call to the function?

1029

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Why do we need templates?

990

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What are c++ tokens?

1055

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Which bitwise operator is used to check whether a particular bit is on or off?

1056

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What's the best free c++ profiler for windows?

1081

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What is lvalue?

1169

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how can i access a direct (absolute, not the offset) memory address? here is what i tried: wrote a program that ask's for an address from the user, creates a FAR pointer to that adress and shows it. then the user can increment/decrement the value in that address by pressing p(inc+) and m(dec-). NOW, i compiled that program and opened it twice (in 2 different windows) and gave twice the same address to it. now look what happen - if i change the value in one "window" of the program, it DOES NOT change in the other! even if they point to the same address in the memory! here is the code snippet: //------------------------------------------------------ #include //INCLUDE EVERY KNOWN HEADER FILE #include //FOR ANY CASE... #include #include #include main() { int far *ptr; //FAR POINTER!!! long address; char key=0; //A KEY FROM THE KEYBOARD int temp=0; clrscr(); cout<<"Enter Address:"; cin>>hex>>address; //GETS THE ADDRESS clrscr(); (long)ptr=address; temp=*ptr; //PUTS THE ADDRESS IN THE PTR cout<<"["<

2419

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What is the two main roles of operating system?

1039

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Write a code/algo to find the frequency of each element in an array?

1116

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What are the implicit member functions of class?

1087

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Explain the term memory alignment?

1233

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What is the difference between C and CPP?

1161

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What is function prototyping? What are its advantages?

1088

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What is a c++ vector?

1042

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