C指针剖析.pptxVIP

C 指針應用剖析;基礎概念;A pointer is a programming language data type whose value refers directly to (or points to) another value stored elsewhere in the computer memory using its address;ID;;棧/堆/靜態存儲區總結;棧和堆的極限大小;;;2.;void GetMemory(char *p) { p = (char *)malloc(100); } void Test(void) { char *str = NULL; GetMemory(str); strcpy(str, hello world); printf(str); };char *GetMemory(void) { char p[] = hello world; return p; } void Test(void) { char *str = NULL; str = GetMemory(); printf(str); };char *GetMemory(void) { char *p = hello world; return p; } void Test(void) { char *str = NULL; str = GetMemory(); printf(str); };void GetMemory2(char **p, int num) { *p = (char *)malloc(num); } void Test(void) { char *str = NULL; GetMemory(str, 20); strcpy(str, hello); free(str); printf(str); };void Test(void) { char *str = (char *) malloc(100); strcpy(str, “hello”); free(str); if(str != NULL) { strcpy(str, “world”); printf(str); } };free究竟對內存做了什麽?;3.;指針常量和常量指針;指針數組和數組指針;int myInt = 1; int *pInt = myInt;;常用表達式2;常用表達式3;常用表達式3;常用表達式4;常用表達式5;常用表達式6;常用表達式7;常用表達式8;常用表達式9;常用表達式10;4.;1.指针没有指向一块合法的内存;2.內存分配成功未初始化;3.內存越界;4.內存洩漏;4.內存洩漏;4.內存洩漏;5.訪問空指針;課后思考;恭請指導！