下面是做项目时实现的一个动态数组，先后加入了好几个之后的项目，下面晒下代码。

头文件：

# ifndef __CVECTOR_H__ # define __CVECTOR_H__ # define MIN_LEN 256 # define CVEFAILED -1 # define CVESUCCESS 0 # define CVEPUSHBACK 1 # define CVEPOPBACK 2 # define CVEINSERT 3 # define CVERM 4 # define EXPANED_VAL 1 # define REDUSED_VAL 2 typedef void *citerator; typedef struct _cvector *cvector; # ifdef _cplusplus # define EXTERN_ extern "C" # else # define EXTERN_ extern # endif EXTERN_ cvector cvector_create (const size_t size ); EXTERN_ void cvector_destroy (const cvector cv ); EXTERN_ size_t cvector_length (const cvector cv ); EXTERN_ int cvector_pushback (const cvector cv, void *memb ); EXTERN_ int cvector_popback (const cvector cv, void *memb ); EXTERN_ size_t cvector_iter_at (const cvector cv, citerator iter ); EXTERN_ int cvector_iter_val (const cvector cv, citerator iter, void *memb); EXTERN_ citerator cvector_begin (const cvector cv ); EXTERN_ citerator cvector_end (const cvector cv ); EXTERN_ citerator cvector_next (const cvector cv, citerator iter ); EXTERN_ int cvector_val_at (const cvector cv, size_t index, void *memb ); EXTERN_ int cvector_insert (const cvector cv, citerator iter, void *memb); EXTERN_ int cvector_insert_at(const cvector cv, size_t index, void *memb ); EXTERN_ int cvector_rm (const cvector cv, citerator iter ); EXTERN_ int cvector_rm_at (const cvector cv, size_t index ); /* for test */ EXTERN_ void cv_info (const cvector cv ); EXTERN_ void cv_print (const cvector cv ); #endif /* EOF file cvector.h */

C文件：

# include <stdio.h> # include <stdlib.h> # include <string.h> # include <unistd.h> # define MIN_LEN 256 # define CVEFAILED -1 # define CVESUCCESS 0 # define CVEPUSHBACK 1 # define CVEPOPBACK 2 # define CVEINSERT 3 # define CVERM 4 # define EXPANED_VAL 1 # define REDUSED_VAL 2 typedef void *citerator; typedef struct _cvector { void *cv_pdata; size_t cv_len, cv_tot_len, cv_size; } *cvector; # define CWARNING_ITER(cv, iter, file, func, line) do { if ((cvector_begin(cv) > iter) || (cvector_end(cv) <= iter)) { fprintf(stderr, "var(" #iter ") warng out of range, " "at file:%s func:%s line:%d!!/n", file, func, line); return CVEFAILED; } } while (0) # ifdef _cplusplus # define EXTERN_ extern "C" # else # define EXTERN_ extern # endif EXTERN_ cvector cvector_create (const size_t size ); EXTERN_ void cvector_destroy (const cvector cv ); EXTERN_ size_t cvector_length (const cvector cv ); EXTERN_ int cvector_pushback (const cvector cv, void *memb ); EXTERN_ int cvector_popback (const cvector cv, void *memb ); EXTERN_ size_t cvector_iter_at (const cvector cv, citerator iter ); EXTERN_ int cvector_iter_val (const cvector cv, citerator iter, void *memb); EXTERN_ citerator cvector_begin (const cvector cv ); EXTERN_ citerator cvector_end (const cvector cv ); EXTERN_ citerator cvector_next (const cvector cv, citerator iter ); EXTERN_ int cvector_val_at (const cvector cv, size_t index, void *memb ); EXTERN_ int cvector_insert (const cvector cv, citerator iter, void *memb); EXTERN_ int cvector_insert_at(const cvector cv, size_t index, void *memb ); EXTERN_ int cvector_rm (const cvector cv, citerator iter ); EXTERN_ int cvector_rm_at (const cvector cv, size_t index ); /* for test */ EXTERN_ void cv_info (const cvector cv ); EXTERN_ void cv_print (const cvector cv ); cvector cvector_create(const size_t size) { cvector cv = (cvector)malloc(sizeof (struct _cvector)); if (!cv) return NULL; cv->cv_pdata = malloc(MIN_LEN * size); if (!cv->cv_pdata) { free(cv); return NULL; } cv->cv_size = size; cv->cv_tot_len = MIN_LEN; cv->cv_len = 0; return cv; } void cvector_destroy(const cvector cv) { free(cv->cv_pdata); free(cv); return; } size_t cvector_length(const cvector cv) { return cv->cv_len; } int cvector_pushback(const cvector cv, void *memb) { if (cv->cv_len >= cv->cv_tot_len) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_pdata = pd_sav; cv->cv_tot_len >>= EXPANED_VAL; return CVEPUSHBACK; } } memcpy(cv->cv_pdata + cv->cv_len * cv->cv_size, memb, cv->cv_size); cv->cv_len++; return CVESUCCESS; } int cvector_popback(const cvector cv, void *memb) { if (cv->cv_len <= 0) return CVEPOPBACK; cv->cv_len--; memcpy(memb, cv->cv_pdata + cv->cv_len * cv->cv_size, cv->cv_size); if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL)) && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL))) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len >>= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = pd_sav; return CVEPOPBACK; } } return CVESUCCESS; } size_t cvector_iter_at(const cvector cv, citerator iter) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); return (iter - cv->cv_pdata) / cv->cv_size; } int cvector_iter_val(const cvector cv, citerator iter, void *memb) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); memcpy(memb, iter, cv->cv_size); return 0; } citerator cvector_begin(const cvector cv) { return cv->cv_pdata; } citerator cvector_end(const cvector cv) { return cv->cv_pdata + (cv->cv_size * cv->cv_len); } static inline void cvmemove_foreward(const cvector cv, void *from, void *to) { size_t size = cv->cv_size; void *p; for (p = to; p >= from; p -= size) memcpy(p + size, p, size); return; } static inline void cvmemove_backward(const cvector cv, void *from, void *to) { memcpy(from, from + cv->cv_size, to - from); return; } int cvector_insert(const cvector cv, citerator iter, void *memb) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); if (cv->cv_len >= cv->cv_tot_len) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_pdata = pd_sav; cv->cv_tot_len >>= EXPANED_VAL; return CVEINSERT; } } cvmemove_foreward(cv, iter, cv->cv_pdata + cv->cv_len * cv->cv_size); memcpy(iter, memb, cv->cv_size); cv->cv_len++; return CVESUCCESS; } int cvector_insert_at(const cvector cv, size_t index, void *memb) { citerator iter; if (index >= cv->cv_tot_len) { cv->cv_len = index + 1; while (cv->cv_len >= cv->cv_tot_len) cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); iter = cv->cv_pdata + cv->cv_size * index; memcpy(iter, memb, cv->cv_size); } else { iter = cv->cv_pdata + cv->cv_size * index; cvector_insert(cv, iter, memb); } return 0; } citerator cvector_next(const cvector cv, citerator iter) { return iter + cv->cv_size; } int cvector_val(const cvector cv, citerator iter, void *memb) { memcpy(memb, iter, cv->cv_size); return 0; } int cvector_val_at(const cvector cv, size_t index, void *memb) { memcpy(memb, cv->cv_pdata + index * cv->cv_size, cv->cv_size); return 0; } int cvector_rm(const cvector cv, citerator iter) { citerator from; citerator end; CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); from = iter; end = cvector_end(cv); memcpy(from, from + cv->cv_size, end - from); cv->cv_len--; if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL)) && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL))) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len >>= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = pd_sav; return CVERM; } } return CVESUCCESS; } int cvector_rm_at(const cvector cv, size_t index) { citerator iter; iter = cv->cv_pdata + cv->cv_size * index; CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); return cvector_rm(cv, iter); } void cv_info(const cvector cv) { printf("/n/ntot :%s : %d/n", __func__, cv->cv_tot_len); printf("len :%s : %d/n", __func__, cv->cv_len); printf("size:%s : %d/n/n", __func__, cv->cv_size); return; } void cv_print(const cvector cv) { int num; citerator iter; if (cvector_length(cv) == 0) fprintf(stderr, "file:%s func:%s line:%d error, null length cvector!!/n", __FILE__, __func__, __LINE__); for (iter = cvector_begin(cv); iter != cvector_end(cv); iter = cvector_next(cv, iter)) { cvector_iter_val(cv, iter, &num); printf("var:%d at:%d/n", num, cvector_iter_at(cv, iter)); } return; }

改进版

上面那份代码是在Linux下写的，如果是在Windows的Visul C++环境下编译似乎会出些问题，所以特别做了个改进版：

下面是更新后的代码：

cvector.h

# ifndef __CVECTOR_H__ # define __CVECTOR_H__ # include <stdio.h> # include <stdlib.h> # include <string.h> # define MIN_LEN 256 # define CVEFAILED -1 # define CVESUCCESS 0 # define CVEPUSHBACK 1 # define CVEPOPBACK 2 # define CVEINSERT 3 # define CVERM 4 # define EXPANED_VAL 1 # define REDUSED_VAL 2 typedef void *citerator; typedef struct _cvector *cvector; # ifdef __cplusplus extern "C" { # endif cvector cvector_create (const size_t size ); void cvector_destroy (const cvector cv ); size_t cvector_length (const cvector cv ); int cvector_pushback (const cvector cv, void *memb ); int cvector_popback (const cvector cv, void *memb ); size_t cvector_iter_at (const cvector cv, citerator iter ); int cvector_iter_val (const cvector cv, citerator iter, void *memb); citerator cvector_begin (const cvector cv ); citerator cvector_end (const cvector cv ); citerator cvector_next (const cvector cv, citerator iter ); int cvector_val_at (const cvector cv, size_t index, void *memb ); int cvector_insert (const cvector cv, citerator iter, void *memb); int cvector_insert_at(const cvector cv, size_t index, void *memb ); int cvector_rm (const cvector cv, citerator iter ); int cvector_rm_at (const cvector cv, size_t index ); /* for test */ void cv_info (const cvector cv ); void cv_print (const cvector cv ); # ifdef __cplusplus } # endif #endif /* EOF file cvector.h */

cvector.c

#include "cvector.h" #ifndef __gnu_linux__ #define __func__ "unknown" #define inline __forceinline #endif # define CWARNING_ITER(cv, iter, file, func, line) do { if ((cvector_begin(cv) > iter) || (cvector_end(cv) <= iter)) { fprintf(stderr, "var(" #iter ") warng out of range, " "at file:%s func:%s line:%d!!n", file, func, line); return CVEFAILED; } } while (0) struct _cvector { void *cv_pdata; size_t cv_len, cv_tot_len, cv_size; }; cvector cvector_create(const size_t size) { cvector cv = (cvector)malloc(sizeof (struct _cvector)); if (!cv) return NULL; cv->cv_pdata = malloc(MIN_LEN * size); if (!cv->cv_pdata) { free(cv); return NULL; } cv->cv_size = size; cv->cv_tot_len = MIN_LEN; cv->cv_len = 0; return cv; } void cvector_destroy(const cvector cv) { free(cv->cv_pdata); free(cv); return; } size_t cvector_length(const cvector cv) { return cv->cv_len; } int cvector_pushback(const cvector cv, void *memb) { if (cv->cv_len >= cv->cv_tot_len) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_pdata = pd_sav; cv->cv_tot_len >>= EXPANED_VAL; return CVEPUSHBACK; } } memcpy((char *)cv->cv_pdata + cv->cv_len * cv->cv_size, memb, cv->cv_size); cv->cv_len++; return CVESUCCESS; } int cvector_popback(const cvector cv, void *memb) { if (cv->cv_len <= 0) return CVEPOPBACK; cv->cv_len--; memcpy(memb, (char *)cv->cv_pdata + cv->cv_len * cv->cv_size, cv->cv_size); if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL)) && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL))) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len >>= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = pd_sav; return CVEPOPBACK; } } return CVESUCCESS; } size_t cvector_iter_at(const cvector cv, citerator iter) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); return ((char *)iter - (char *)cv->cv_pdata) / cv->cv_size; } int cvector_iter_val(const cvector cv, citerator iter, void *memb) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); memcpy(memb, iter, cv->cv_size); return 0; } citerator cvector_begin(const cvector cv) { return cv->cv_pdata; } citerator cvector_end(const cvector cv) { return (char *)cv->cv_pdata + (cv->cv_size * cv->cv_len); } static inline void cvmemove_foreward(const cvector cv, void *from, void *to) { size_t size = cv->cv_size; char *p; for (p = (char *)to; p >= (char *)from; p -= size) memcpy(p + size, p, size); return; } static inline void cvmemove_backward(const cvector cv, void *from, void *to) { memcpy(from, (char *)from + cv->cv_size, (char *)to - (char *)from); return; } int cvector_insert(const cvector cv, citerator iter, void *memb) { CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); if (cv->cv_len >= cv->cv_tot_len) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_pdata = pd_sav; cv->cv_tot_len >>= EXPANED_VAL; return CVEINSERT; } } cvmemove_foreward(cv, iter, (char *)cv->cv_pdata + cv->cv_len * cv->cv_size); memcpy(iter, memb, cv->cv_size); cv->cv_len++; return CVESUCCESS; } int cvector_insert_at(const cvector cv, size_t index, void *memb) { citerator iter; if (index >= cv->cv_tot_len) { cv->cv_len = index + 1; while (cv->cv_len >= cv->cv_tot_len) cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); iter = (char *)cv->cv_pdata + cv->cv_size * index; memcpy(iter, memb, cv->cv_size); } else { iter = (char *)cv->cv_pdata + cv->cv_size * index; cvector_insert(cv, iter, memb); } return 0; } citerator cvector_next(const cvector cv, citerator iter) { return (char *)iter + cv->cv_size; } int cvector_val(const cvector cv, citerator iter, void *memb) { memcpy(memb, iter, cv->cv_size); return 0; } int cvector_val_at(const cvector cv, size_t index, void *memb) { memcpy(memb, (char *)cv->cv_pdata + index * cv->cv_size, cv->cv_size); return 0; } int cvector_rm(const cvector cv, citerator iter) { citerator from; citerator end; CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); from = iter; end = cvector_end(cv); memcpy(from, (char *)from + cv->cv_size, (char *)end - (char *)from); cv->cv_len--; if ((cv->cv_tot_len >= (MIN_LEN << REDUSED_VAL)) && (cv->cv_len <= (cv->cv_tot_len >> REDUSED_VAL))) { void *pd_sav = cv->cv_pdata; cv->cv_tot_len >>= EXPANED_VAL; cv->cv_pdata = realloc(cv->cv_pdata, cv->cv_tot_len * cv->cv_size); if (!cv->cv_pdata) { cv->cv_tot_len <<= EXPANED_VAL; cv->cv_pdata = pd_sav; return CVERM; } } return CVESUCCESS; } int cvector_rm_at(const cvector cv, size_t index) { citerator iter; iter = (char *)cv->cv_pdata + cv->cv_size * index; CWARNING_ITER(cv, iter, __FILE__, __func__, __LINE__); return cvector_rm(cv, iter); } void cv_info(const cvector cv) { printf("nntot :%s : %dn", __func__, cv->cv_tot_len); printf("len :%s : %dn", __func__, cv->cv_len); printf("size:%s : %dnn", __func__, cv->cv_size); return; } void cv_print(const cvector cv) { int num; citerator iter; if (cvector_length(cv) == 0) fprintf(stderr, "file:%s func:%s line:%d error, null length cvector!!n", __FILE__, __func__, __LINE__); for (iter = cvector_begin(cv); iter != cvector_end(cv); iter = cvector_next(cv, iter)) { cvector_iter_val(cv, iter, &num); printf("var:%d at:%dn", num, cvector_iter_at(cv, iter)); } return; }

main.cpp

#include "cvector.h" int main() { int i = 1; cvector cv = cvector_create(sizeof(int)); cvector_pushback(cv, &i); cvector_pushback(cv, &i); cvector_pushback(cv, &i); cvector_pushback(cv, &i); cv_print(cv); cvector_destroy(cv); return 0; }