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C Programming for the Absolute Beginner phần 8

Tham khảo tài liệu 'c programming for the absolute beginner phần 8', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 9 Introduction to Data Structures emp emp emp1 5 To access individual elements in a structure array you need to provide the array element number surrounded by brackets. To access individual structure members you need to supply the dot operator followed by the structure member name as revealed in the next segment of code which uses the strcpy function to copy the text Spencer into the memory reserved by the structure member. strcpy emp1 0 .fname Spencer The next program and its output shown in Figure 9.2 demonstrate arrays of structures in more detail. i nclude stdio.h i nclude string.h typedef struct scores char name 10 int score s main s highScores 3 int x assign values to members strcpy highScores 0 .name Hunter highScores 0 .score 40768 strcpy highScores 1 .name Kenya highScores 1 .score 38565 strcpy highScores 2 .name Apollo C Programming for the Absolute Beginner Second Edition highScores 2 .score 35985 print array content printf nTop 3 High Scores n for x 0 x 3 x printf n s t d n highScores x .name highScores x .score end main figure 9.2 Creating and using arrays of structures. Passing Structures to Functions To utilize the power of structures you need to understand how they are passed to functions for processing. Structures can be passed to functions in a multitude of ways including passing by value for read-only access and passing by reference for modifying structure member contents. Passing by value protects an incoming variable s value by sending a copy of the original data rather than the actual variable to the function. Passing by reference sends a variable s memory address to a function which allows statements in the function to modify the original variable s memory contents. Passing Structures by Value Like any parameter passed by value C makes a copy of the incoming structure variable for the function to use. Any modifications made to the parameter within the receiving function are not made to the original variable s value. To pass a .