what is the purpose of the following code, and is there any problem with the code? void fn(long* p1, long* p2) { register int x = *p1; register int y = *p2; x ^= y; y ^= x; x ^= y; *p1 = x; *p2 = y; }

1 Answers   Google,

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How do you list a file’s date and time?

0 Answers  

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How can I do serial ("comm") port I/O?

0 Answers   Celstream,

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How can I generate floating-point random numbers?

0 Answers  

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A global variable when referred to in another file is declared as this a) local variable b) external variable c) constant d) pointers

0 Answers  

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1.what are local and global variables? 2.what is the scope of static variables? 3.what is the difference between static and global variables? 4.what are volatile variables? 5.what is the use of 'auto' keyword? 6.how do we make a global variable accessible across files? Explain the extern keyword? 7.what is a function prototype? 8.what does keyword 'extern' mean in a function declaration?

2 Answers   nvidia,

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What happens if a header file is included twice?

0 Answers  

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How do you define structure?

0 Answers  

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What is the value of c?

0 Answers  

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application of static variables in real time

1 Answers   Bosch,

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create a C program that displays one z,two y's,three x's until twenty six A's. plzz answer i need it tomorrow.

4 Answers  

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what is the use of macro program

1 Answers   TCS,

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