Session 06 Introduction to Programming

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Session 06 Introduction to Programming

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Differentiate between Command, Program and SoftwareExplain the beginning of CExplain when and why is C usedDiscuss the C program structureDiscuss algorithmsDraw flowchartsList the symbols used in flowcharts

LBC, Session 6 Array FPT APTECH COMPUTER EDUCATION HANOI Objectives • Explain array elements and indices • Define an array • Explain array handling in C • Explain how an array is initialized • Explain string / character arrays • Explain two dimensional arrays • Explain initialization of two dimensional arrays LBC/Session 6 2 What is Array? • An array is a collection of data elements of the same type. • Each element of the array has the same data type, same storage class and same characteristics. • These elements are known as members of the array. LBC/Session 6 3 Array Elements & Indices • Each member of an array is identified by unique index or subscript assigned to it • An index is a positive integer enclosed in [ ] placed immediately after the array name • An index holds integer values starting with zero • An array with 11 elements will look like: players[0], players[1], …, players[10] LBC/Session 6 4 Defining an Array-1 . • An array has some particular characteristics and has to be defined with them • These characteristics include: – Storage Class – Data Types of the elements in the Array – Array Name Which indicates the location of the first member of the array – Array Size a constant evaluating to a +ve value LBC/Session 6 5 Defining an Array-2 • An array is defined in the same way as a variable is defined. • The only change is that the array name is followed by one or more expressions, enclosed within square brackets [], specifying the array dimension. storage_class data_type array_name[size] Example: int player[11]; LBC/Session 6 6 Norms with Arrays • All elements of an array are of the same type • Each element of an array can be used wherever a variable is allowed or required • Each element of an array can be referenced using a variable or an integer expression • Arrays can have their data types like: int, char, float or double LBC/Session 6 7 Array Handling in C-1 • An array is treated differently from a variable in C • Two arrays, even if they are of the same type and size cannot be tested for equality • It is not possible to assign one array directly to another • Values cannot be assigned to an array on the whole, instead values are assigned to the elements of the array LBC/Session 6 8 Array Handling in C-2 void main() { int ary[10]; int i, total, high; for(i=0; i[...]... and columns • A two–dimensional array is declared as - int temp[4][3]; LBC /Session 6 11 Init of Multidimensional Arrays-1 int ary[3][4] = {1,2,3,4,5,6,7,8,9,10,11,12}; The result of the above assignment will be as follows : LBC /Session 6 12 Init of Multidimensional Arrays-2 int ary[3][4]= { {1,2,3}, {4,5,6}, {7,8,3} }; LBC /Session 6 13 Init of Multidimensional Arrays-3 The result of the assignment... in the following manner : char str_ary[25][80]; LBC /Session 6 14 Init array of string void main () { int i, n = 0; int item; char lines[10][12];char temp[12]; printf(“Enter each string on a separate line”); printf(“Type ‘END’ when over”); do { printf(“String %d : ”, n+1); scanf(“%s”, lines[n]); } while (strcmp(lines[n++], “END”)); / /to continue LBC /Session 6 15 reorder the list of strings /*reorder... */ strcpy (temp, lines[item]); strcpy (lines[item], x[i]); strcpy (lines[i], temp); } } } LBC /Session 6 16 Display the arranged list of strings /* Display the arranged list of strings */ printf(“Recorded list of strings : \n”); for(i = 0; i < n ; ++i) { printf("\nString %d is %s", i+1, lines[i]); } } LBC /Session 6 17 Summary • Define an array, element, index • Array handling in C • Initialization array... Define an array, element, index • Array handling in C • Initialization array • Explain string / character arrays • Explain two dimensional arrays • Explain initialization of two dimensional arrays LBC /Session 6 18 ... int temp[4][3]; LBC /Session 11 Init of Multidimensional Arrays-1 int ary[3][4] = {1,2,3,4,5,6,7,8,9,10,11,12}; The result of the above assignment will be as follows : LBC /Session 12 Init of Multidimensional... same storage class and same characteristics • These elements are known as members of the array LBC /Session Array Elements & Indices • Each member of an array is identified by unique index or subscript... with zero • An array with 11 elements will look like: players[0], players[1], …, players[10] LBC /Session Defining an Array-1 • An array has some particular characteristics and has to be defined

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Mục lục

  • LBC, Session 6

  • Objectives

  • What is Array?

  • Array Elements & Indices

  • Defining an Array-1

  • Defining an Array-2

  • Norms with Arrays

  • Array Handling in C-1

  • Array Handling in C-2

  • Array Initialization

  • Two-Dimensional Arrays

  • Init of Multidimensional Arrays-1

  • Init of Multidimensional Arrays-2

  • Init of Multidimensional Arrays-3

  • Init array of string

  • reorder the list of strings

  • Display the arranged list of strings

  • Summary

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