Introduction

This is a place dedicated for frequently asked questions(FAQ) in C and C++ programming forums of orkut∞. If you're a beginner or new to any of the C or C++ forum, please go through these already answered questions, so that we could avoid repetitive discussions there and move on to discussing new topics.

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FAQs list [in order of most frequently asked questions first]

• How to print "Hello world!" without using a semicolon?
• How to swap two numbers without using temporary variable?
• How to add two numbers without using arithmetic operators?
• How to find whether a given number is even or odd without using % (modulus) operator?
• How to find whether the given number is a power of 2 in single step (without using loops)?
• How to find greatest of two/three/four numbers without using relational operators?
• How to print 1 to n without using any kind of loops or recursion?
• What is wrong with using void main()? Where does the returned value from main() go?
• How to write a program which prints its own source code as output?
• What are the differences between C and C++?
• My compiler (Turbo C/C++) is not working correctly on Vista/XP, what should I do?
• Can you write a code which compiles in C but not in C++?
• What are far, huge and near qualified pointers?
• What are the differences between structure and union?
• How to count the number of 1's (set bits) in a given number ?
• Which are the good books to learn C programming ?
• How can we connect to database using C?
• Where can I find free C compilers to download?
• Where can I find C projects to download?
• How to allocate a multi-dimensional (2D/3D) array dynamically using malloc()?
• How can we pass 2 or 3 dimensional array as argument to function?
• What is the output of printf("%d"); ?
• How to find the power of 2 just greater than or equal to a given number?
• What are malloc and calloc and what is the difference between them?
• Why do we get segmentation fault error?
• How to find the size of an object/datatype without using sizeof operator?
• How to set a particular bit in a byte? How to unset it?
• How to find the endianness of a system?
• Can we call any function before main function is called?
• Why are my floating point comparisons going wrong?
• What is a null pointer? How is it different from NULL?
• Is the main function a must in a program?
• Where can I find C interview questions?
• Where can I find free E-Books on C to download?
• How can we return more than one value from a function?
• Why shouldn't we use the Turbo C/C++(DOS) compilers?
• Are there any features in C language that are not in C++?
• How to find factorial of big numbers such as 100 or higher?
• How can I display images such as BMP/JPEG/GIF in my program?
• Why does size of struct show greater than total size of its members?
• What are wild and dangling pointers?
• Where can I find C standards documents to download?
• Which increment statement is faster among: ++i, i++ and i=i+1?