Implement the substr() function in C.

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Define a macro called SQR which squares a number

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How can I write a macro which takes a variable number of arguments?

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What do the system calls fork(), vfork(), exec(), wait(), waitpid() do? Whats a Zombie process? Whats the difference between fork() and vfork()?

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How does the function strtok() work? How to tokenizing Strings in C ?

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What are the important String functions in C ?

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What does printf() return?

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How can we find out the length of an array dynamically in C?

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Write a C program to count bits set in an integer?

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Binary Search Tree (BST) Traversal

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