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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CC78K4 датащи(PDF) 51 Page - NEC |
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CC78K4 датащи(HTML) 51 Page - NEC |
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51 / 523 page  User’s Manual U15556EJ1V0UM 51 CHAPTER 3 DECLARATION OF TYPES AND STORAGE CLASSES This chapter explains how data (variables) or functions to be used in C should be declared as well as the scope for each data or function. A declaration means the specification of an interpretation or attribute for an identifier or a collection of identifiers. A declaration to reserve a storage area for an object or function named by an identifier is referred to as a “definition”. An example of a declaration is shown below. #define TRUE 1 #define FALSE 0 #define SIZE 200 void main(void) { auto int i, prime, k; /* declaration of automatic variables */ for ( i = 0 ; i <= SIZE ; i++) mark [i] = TRUE ; . . . A declaration is configured with a storage class specifier, type specifier, initialize declarator, etc. The storage class specifier and type specifier specify the linkage, storage duration, and the type of entity indicated by the declarator. An initialize declarator list is a list of declarators delimited with a comma. Each declarator may have additional type information or initializer or both. If an identifier for an object is declared to have no linkage, the type of the object must be perfect (the object with information related to the size) at the end of the declarator or initialize declarator (if it has an initializer). |
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