What is meant by preprocessor in c?

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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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What is console in c language?

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Magic square

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Is calloc better than malloc?

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What is the difference between malloc() and calloc()?

3 Answers  

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What is extern keyword in c?

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What is the difference between struct and union in C?

1 Answers  

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Difference between MAC vs. IP Addressing

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In a switch statement, explain what will happen if a break statement is omitted?

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i = 25;switch (i) {case 25: printf("The value is 25 ");case 30: printf("The value is 30 "); When the above statements are executed the output will be : a) The value is 25 b) The value is 30 c) The value is 25 The value is 30 d) none

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The C language terminator is a.semicolon b.colon c.period d.exclamation mark

6 Answers   TCS,

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