{"id":247,"date":"2007-06-11T14:00:00","date_gmt":"2007-06-11T06:00:00","guid":{"rendered":"http:\/\/www.freemindworld.com\/blog\/permalink\/?id=20070611"},"modified":"2012-01-30T13:57:55","modified_gmt":"2012-01-30T05:57:55","slug":"070611_c_two_dimension_array","status":"publish","type":"post","link":"https:\/\/www.freemindworld.com\/blog\/2007\/070611_c_two_dimension_array.shtml","title":{"rendered":"\u5982\u4f55\u5728C++\u4e2d\u52a8\u6001\u5206\u914d\u4e8c\u7ef4\u6570\u7ec4"},"content":{"rendered":"

\u8fd9\u4e2a\u95ee\u9898\u5e94\u8be5\u662f\u6211\u5728CSDN\u8e6d\u5206\u65f6\u56de\u7b54\u6b21\u6570\u6bd4\u8f83\u591a\u7684\u4e00\u4e2a\u95ee\u9898\u4e86\uff0c\u6211\u7684\u56de\u7b54\u4e00\u822c\u662f\u4e09\u79cd\u65b9\u6cd5\uff1a(1)\u7528vector\u7684vector\uff0c(2)\u5148\u5206\u914d\u4e00\u4e2a\u6307\u9488\u6570\u7ec4\uff0c\u7136\u540e\u8ba9\u91cc\u9762\u6bcf\u4e00\u4e2a\u6307\u9488\u518d\u6307\u5411\u4e00\u4e2a\u6570\u7ec4\uff0c\u8fd9\u4e2a\u505a\u6cd5\u7684\u597d\u5904\u662f\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u65f6\u6bd4\u8f83\u76f4\u89c2\uff0c\u53ef\u4ee5\u7528a[x][y]\u8fd9\u6837\u7684\u5199\u6cd5\uff0c\u7f3a\u70b9\u662f\u5b83\u76f8\u5f53\u4e8eC#\u4e2d\u7684\u4e00\u4e2a\u952f\u9f7f\u6570\u7ec4\uff0c\u5185\u5b58\u7a7a\u95f4\u4e0d\u8fde\u7eed\u3002(3)\u76f4\u63a5\u5206\u914d\u4e00\u4e2ax*y\u5927\u5c0f\u7684\u4e00\u7ef4\u6570\u7ec4\uff0c\u8fd9\u6837\u4fdd\u8bc1\u7a7a\u95f4\u662f\u8fde\u7eed\u7684\uff0c\u4f46\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u4e0d\u76f4\u89c2\u3002\u5bf9\u4e8e\u6211\u8fd9\u4e2a\u201c\u7ecf\u5178\u201d\u56de\u7b54\uff0c\u6211\u90a3\u65f6\u8fd8\u4e00\u76f4\u662f\u633a\u5f97\u610f\u7684\uff0c\u81f3\u5c11\u4ece\u8e6d\u5206\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u6837\u56de\u7b54\u8fd8\u662f\u5f88\u6709\u6548\u7684\u3002<\/p>\n

\u4eca\u5929\u5728ChinaUnix\u8bba\u575b\u95f2\u901b\u65f6\u770b\u5230\u4e00\u4e2a\u8d34\u5b50\uff0c\u518d\u6b21\u8bc1\u660e\u4e86\u6211\u5728C++\u65b9\u9762\u624d\u758f\u5b66\u6d45\u3002<\/p>\n

#include <stdio.h>
\n#include <stdlib.h>
\n#include <string.h>
\nvoid **darray_new(int row, int col, int size)
\n{
\nvoid **arr;
\narr = (void **) malloc(sizeof(void *) * row + size * row * col);
\nif (arr != NULL)
\n{
\nvoid *head;
\nhead = (void *) arr + sizeof(void *) * row;
\nmemset(arr, 0, sizeof(void *) * row + size * row * col);
\nwhile (row--)
\narr[row] = head + size * row * col;
\n}
\nreturn arr;
\n}
\nvoid darray_free(void **arr)
\n{
\nif (arr != NULL)
\nfree(arr);
\n}<\/code><\/p>\n

\u55ef\uff0c\u8fde\u7eed\u5206\u914d\u5185\u5b58\uff0c\u800c\u4e14\u53ef\u4ee5\u7528a[x][y]\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\uff01\u53ef\u8c13\u4e8c\u7ef4\u6570\u7ec4\u52a8\u6001\u5206\u914d\u7684\u7edd\u5999\u65b9\u6cd5\uff01\u8fd9\u6bb5\u7a0b\u5e8f\u662fC\u7684\uff0c\u4f3c\u4e4e\u8981\u6539\u6210\u652f\u6301\u5bf9\u8c61\u5206\u914d\u7684C++\u7248\u4e5f\u4e0d\u662f\u4ec0\u4e48\u96be\u4e8b\uff08\u4e0d\u8fc7\u4f30\u8ba1\u5f97\u7528\u4e0aplacement new\u5427\uff0c\u55ef\uff0c\u9700\u8981\u518d\u601d\u8003\u4e00\u4e0b\u2026\u2026\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u8fd9\u4e2a\u95ee\u9898\u5e94\u8be5\u662f\u6211\u5728CSDN\u8e6d\u5206\u65f6\u56de\u7b54\u6b21\u6570\u6bd4\u8f83\u591a\u7684\u4e00\u4e2a\u95ee\u9898\u4e86\uff0c\u6211\u7684\u56de\u7b54\u4e00\u822c\u662f\u4e09\u79cd\u65b9 … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-247","post","type-post","status-publish","format-standard","hentry","category-11"],"_links":{"self":[{"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/posts\/247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/comments?post=247"}],"version-history":[{"count":0,"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/posts\/247\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/media?parent=247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/categories?post=247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freemindworld.com\/blog\/wp-json\/wp\/v2\/tags?post=247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}