Learn to Program with C_ Learn to Program using the Popular C Programming Language ( PDFDrive )

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Chapter 8 ■ Arrays16. Write a function removethat, given a string str and a character c,removes all occurrences of c from str. For example, if str contains"brother,"remove(str,'r') should change str to "bothe."17. Write a program to read English words and their equivalent Spanish words intotwo arrays. Request the user to type several English words. For each, print theequivalent Spanish word. Choose a suitable end-of-data marker. Modify theprogram so that the user types Spanish words instead.18. The number 27472 is said to be palindromic since it reads the same forwards orbackwards. Write a function that, given an integer n, returns 1 if n is palindromicand 0 if it is not.19. Write a program to find out, for a class of students, the number of families with1, 2, 3, ... up to 8 or more children. The data consists of the number of children ineach pupil’s family, terminated by 0. (Why is 0 a good value to use?)20. A survey of 10 pop artists is made. Each person votes for an artist by specifyingthe number of the artist (a value from 1 to 10). Write a program to read the namesof the artists, followed by the votes, and find out which artist is the most popular.Choose a suitable end-of-data marker.21. The children’s game of ‘count-out’ is played as follows. n children (numbered 1 to n)are arranged in a circle. A sentence consisting of m words is used to eliminate onechild at a time until one child is left. Starting at child 1, the children are countedfrom 1 to m and the m th child is eliminated. Starting with the child after the onejust eliminated, the children are again counted from 1 to m and the m th childeliminated. This is repeated until one child is left. Counting is done circularly andeliminated children are not counted. Write a program to read values for n (assumed<= 100) and m (> 0) and print the number of the last remaining child.22. The prime numbers from 1 to 2500 can be obtained as follows. From a list of thenumbers 1 to 2500, cross out all multiples of 2 (but not 2 itself). Then, find the nextnumber (n, say) that is not crossed out and cross out all multiples of n (but not n).Repeat this last step provided that n has not exceeded 50 (the square root of 2500).The numbers remaining in the list (except 1) are prime. Write a program that usesthis method to print all primes from 1 to 2500. Store your output in a file calledprimes.out. This method is called the Sieve of Eratosthenes, named after theGreek mathematician, geographer, and philosopher.23. There are 500 light bulbs (numbered 1 to 500) arranged in a row. Initially, they areall OFF. Starting with bulb 2, all even numbered bulbs are turned ON. Next, startingwith bulb 3, and visiting every third bulb, it is turned ON if it is OFF, and it is turnedOFF if it is ON. This procedure is repeated for every 4th bulb, then every 5h bulb,and so on up to the 500th bulb. Write a program to determine which bulbs are OFFat the end of the above exercise.There is something special about the bulbs that are OFF. What is it? Can you explainwhy it is so?242www.it-ebooks.info
Chapter 9Searching, Sorting, and MergingIn this chapter, we will explain the following:• How to search a list using sequential search• How to sort a list using selection sort• How to sort a list using insertion sort• How to sort a list of strings• How to sort parallel arrays• How to search a sorted list using binary search• How to merge two sorted lists9.1 Sequential SearchIn many cases, an array is used for storing a list of information. Having stored the information, itmay be required to find a given item in the list. For example, an array may be used to store a listof the names of 50 people. It may then be required to find the position in the list at which a givenname (Indira, say) is stored.We need to develop a technique for searching the elements of an array for a given specificone. Since it is possible that the given item is not in the array, our technique must also be ableto determine this. The technique for searching for an item is the same regardless of the typeof elements in the array. However, the implementation of the technique may be different fordifferent types of elements.We will use an integer array to illustrate the technique called sequential search. Consider the arraynum of seven integers:243www.it-ebooks.info
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THE EXPERT’S VOICE® IN PROGRAMMI
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Learn to Program with CCopyright ©
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Contents at a GlanceAbout the Autho
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■ Contents1.7 Write Output with p
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■ Contents■Chapter ■ 5: Progr
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■ Contentsxii7.11 Some Character
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About the AuthorDr. Noel Kalicharan
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AcknowledgementsI would like to exp
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■ PrefaceOf course, you must lear
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Chapter 1 ■ Elementary Programmin
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Chapter 2 ■ C - The Basicstokenin
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2.5 Integer Numbers - intChapter 2
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Chapter 6 ■ CharactersThe ASCII c
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Chapter 7 ■ Functions7.2 skipLine
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Chapter 10 ■ StructuresTo find th
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Chapter 10 ■ StructuresVoteCount
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Chapter 10 ■ Structures6. A file
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■ index• CCharactersarithmetic
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■ index• N, ONamed constants.
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■ indexStrings (cont.)for stateme
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