C语言程序设计课件（英文）C program language 之7 Structure.ppt

Structure * Xue Qing 2009.4 Structure What is Structure Definition Initialization Access the members of structure Structure and pointer Structure and function Structure and array number, name , score1, score2, score3, score4 What is Structure In order to deal with the special data which has several member with different data type, it is need to introduce new data type. Array — an ordered set with the same data type. 1 3 7 9 6 5 90 10 int a[8] 1 8 0 4 5 6 3 2 int a[2][4] int no , char name[20] , float s1, s2, s3, s4 one student: strutrue What is Structure Structure 1 Structure is a advanced data type in C. 2 Structure is a method for grouping a several related data type together. 3 Variables with different types can be grouped in a structure The simple variables : int a , b; a=20, b=85; - invidual Array ：float grade[20]; same type related grade[0] grade[1] grade[2] grade[3] …… What is Structure num name grade1 grade2 10 Li 90.5 A 11 Liu 80 B 12 Wen 88 B …. int char float char How can we define related data that have different type ? struct { int num; char name[10]; float grade1; char grade2; }; What is Structure All variables with the same types can be grouped in a array. 71 74 81 87 zhao 72 81 76 90 liu 61 75 87 78 zhan 67 83 66 87 li 87 98 88 98 wang All variables with different types can be grouped in a structure Content 3-222 m 18 zhao 7-212 f 17 liu 7-121 f 20 li 3-110 m 18 wang add sex age name structure members ( type ,name) Structure variables Definition 1 3 2 A structure is a collection of related variables, any number of type of variables may be included within it. Defining structure,then declaring struct variables. Defining structure and struct variables. structure ’s name can be omitted keyword struct Structure members Sturcture variables Structure variable values struct name { type1 member 1; type2 mem