Exercise 5-14. Modify the sort program to handle a -r flag, which indicates sorting in reverse (decreasing) order. Be sure that -r works with -n. The K&R sort from Section 5.11 calls qsort with a comparison function strcmp. Adding -r requires the comparison function to negate its result. The cleanest approach: add a global flag …
Exercise 3-2. Write a function escape(s,t) that converts characters like newline and tab into visible escape sequences like \n and \t as it copies the string t to s. Use a switch. Write a function for the other direction as well, converting escape sequences into the real characters. Two functions walking their input strings character …
Exercise 1-2. Experiment to find out what happens when printf‘s argument string contains \c, where c is some character not listed above. The escape sequences K&R lists in section 1.5 are: \n (newline), \t (tab), \b (backspace), \” (double quote), and \\ (backslash). The exercise asks what happens with everything else. Approach The key insight …
Exercise 1-1. Run the “hello, world” program on your system. Experiment with leaving out parts of the program to see what error messages you get. This page covers the printf side of Exercise 1-1: what the format string actually does, how escape sequences work, and what happens when you modify or multiply printf calls. For …
A cyclic rotation of an array in C shifts every element one position to the left or right, with the element that falls off one end wrapping around to the other. A left rotation moves the first element to the last position; a right rotation moves the last element to the first position. This operation …
C program which demonstrates the working of increment(++) and decrement(–) operators. Increment operator ++ adds 1 to its operand and Decrement operator — subtracts 1 from its operand. These operators may be used either as a prefix operator or post-fix operator. Read more here: Increment and decrement operators The Program [gist id=”edcbcb339781cb831a2143821b0f32ce”] Sample Output Related programs …