C:多级指针
2021/12/13 6:18:33
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C:多级指针
/* * os = Linux openeuler 4.19.90-2106.3.0.0095.oe1.x86_64 * gcc_version = gcc version 7.3.0 (GCC) * file_name = pointer_test.c * gcc -o pointer_test pointer_test.c * */ #include <stdio.h> typedef struct _people { int id; int age; } people, *people_pt, person, *person_pt; // test pointer int main(int argc, char** argv) { int x=13; int *pt1 = NULL; int **pt2 = NULL; int ***pt3 = NULL; int ****pt4 = NULL; int *****pt5 = NULL; int ******pt6 = NULL; pt1 = &x; pt2 = &pt1; pt3 = &pt2; pt4 = &pt3; pt5 = &pt4; pt6 = &pt5; printf("pt1=%p, *pt1=%d .\n", pt1, *pt1); printf("pt2=%p, *pt2=%p .\n", pt2, *pt2); printf("pt3=%p, *pt3=%p .\n", pt3, *pt3); printf("pt4=%p, *pt4=%p .\n", pt4, *pt4); printf("pt5=%p, *pt5=%p .\n", pt5, *pt5); printf("pt6=%p, *pt6=%p .\n", pt6, *pt6); printf("pt6=%p, ******pt6=%d .\n", pt6, ******pt6); return 0; }
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