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

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Chapter 10 ■ StructuresTo pass the entire structure, we use this:fun6(text);Of course, the header for each of these functions must be written with the appropriateparameter type.In the last example, the fields of text are copied to a temporary place (called the run-timeheap), and the copy is passed to fun6; that is, the structure is passed “by value.” If a structure iscomplicated or contains arrays, the copying operation could be time consuming. In addition,when the function returns, the values of the structure elements must be removed from the heap;this adds to the overhead – the extra processing required to perform a function call.To avoid this overhead, the address of the structure could be passed. This can be done withthe following statement:fun6(&text);However, further discussion involves a deeper knowledge of pointers that is beyond the scopeof this book.EXERCISES 101. Write a program to read names and phone numbers into a structure array.Request a name and print the person’s phone number. Use binary search to look upthe name.2. Write a function that, given two date structures, d1 and d2, returns -1 if d1 comesbefore d2, 0 if d1 is the same as d2, and 1 if d1 comes after d2.3. Write a function that, given two date structures, d1 and d2, returns the number ofdays that d2 is ahead of d1. If d2 comes before d1, return a negative value.4. A time in 24-hour clock format is represented by two numbers; for example, 16 45means the time 16:45: that is, 4:45 p.m.a. Using a structure to represent a time, write a function that, given two timestructures, t1 and t2, returns the number of minutes from t1 to t2. Forexample, if the two given times are 16 45 and 23 25, your function shouldreturn 400.b. Modify the function so that it works as follows: if t2 is less than t1, take it tomean a time for the next day. For example, given the times 20:30 and 6:15,take this to mean 8.30 p.m. to 6.15 a.m. of the next day. Your function shouldreturn 585.5. A length, specified in meters and centimeters, is represented by two integers.For example, the length 3m 75cm is represented by 3 75. Using a structure torepresent a length, write functions to compare, add, and subtract two lengths.305www.it-ebooks.info
Chapter 10 ■ Structures6. A file contains the names and distances jumped by athletes in a long-jumpcompetition. Using a structure to hold a name and distance (which is itself astructure as in Exercise 5), write a program to read the data and print a list ofnames and distance jumped in order of merit (best jumper first).7. A data file contains registration information for six courses – CS20A, CS21A,CS29A, CS30A, CS35A, and CS36A. Each line of data consists of a seven-digitstudent registration number followed by six (ordered) values, each of which is 0or 1. A value of 1 indicates that the student is registered for the correspondingcourse; 0 means the student is not. Thus, 1 0 1 0 1 1 means that the student isregistered for CS20A, CS29A, CS35A, and CS36A, but not for CS21A and CS30A.You may assume that there are no more than 100 students and a registrationnumber 0 ends the data.Write a program to read the data and produce a class list for each course. Each listconsists of the registration numbers of those students taking the course.8. At a school’s bazaar, activities were divided into stalls. At the close of the bazaar, themanager of each stall submitted information to the principal consisting of the nameof the stall, the income earned, and its expenses. Here are some sample data:Games 2300.00 1000.00Sweets 900.00 1000.00a. Create a structure to hold a stall’s datab. Write a program to read the data and print a report consisting of the stallname and net income (income – expenses), in order of decreasing net income(that is, with the most profitable stall first and the least profitable stall last). Inaddition, print the number of stalls, the total profit or loss of the bazaar, andthe stall(s) that made the most profit. Assume that a line containing xxxxxxonly ends the data.306www.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 2C - The BasicsIn this chap
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Chapter 2 ■ C - The Basicstokenin
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2.3.2 Reserved WordsChapter 2 ■ C
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2.5 Integer Numbers - intChapter 2
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Chapter 2 ■ C - The BasicsExercis
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Chapter 6 ■ CharactersThe ASCII c
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Chapter 6 ■ Characters6.6 Count C
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Chapter 7 ■ Functions7.2 skipLine
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Chapter 7 ■ FunctionsWhen we wish
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Chapter 7 ■ FunctionsIf, when a f
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Chapter 8ArraysIn this chapter, we
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Chapter 9Searching, Sorting, and Me
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