{"id":73014,"date":"2026-02-06T22:05:27","date_gmt":"2026-02-06T14:05:27","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/73014.html"},"modified":"2026-02-06T22:05:27","modified_gmt":"2026-02-06T14:05:27","slug":"c%e5%85%a5%e9%97%a8%ef%bc%882%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/73014.html","title":{"rendered":"C++\u5165\u95e8\uff082\uff09"},"content":{"rendered":"

\u4e00\u3001\u5f15\u7528（&）<\/h2>\n

1. \u5f15\u7528\u7684\u6982\u5ff5\u548c\u5b9a\u4e49<\/h3>\n

\u2022 \u672c\u8d28：\u7ed9\u5df2\u5b58\u5728\u7684\u53d8\u91cf\u53d6\u522b\u540d，\u7f16\u8bd1\u5668\u4e0d\u4f1a\u4e3a\u5f15\u7528\u53d8\u91cf\u5f00\u8f9f\u72ec\u7acb\u5185\u5b58\u7a7a\u95f4，\u4e0e\u5f15\u7528\u5bf9\u8c61\u5171\u7528\u540c\u4e00\u5757\u5185\u5b58\u3002<\/p>\n

\u2022 \u8bed\u6cd5\u683c\u5f0f：\u7c7b\u578b& \u5f15\u7528\u522b\u540d = \u5f15\u7528\u5bf9\u8c61;<\/p>\n

\u2022 \u793a\u4f8b：<\/p>\n

int a = 0;
\nint& b = a; \u00a0\/\/ b\u662fa\u7684\u522b\u540d
\nint& c = a; \u00a0\/\/ \u4e00\u4e2a\u53d8\u91cf\u53ef\u591a\u4e2a\u5f15\u7528
\nint& d = b; \u00a0\/\/ \u7ed9\u522b\u540d\u53d6\u522b\u540d，\u6700\u7ec8\u4ecd\u6307\u5411a
\n++d; \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u64cd\u4f5cd\u7b49\u4ef7\u4e8e\u64cd\u4f5ca
\n\/\/ \u8f93\u51fa\u5730\u5740\u76f8\u540c，\u9a8c\u8bc1\u5171\u7528\u5185\u5b58
\ncout << &a << endl;
\ncout << &b << endl;
\ncout << &c << endl;
\ncout << &d << endl;<\/p>\n

2. \u5f15\u7528\u7684\u4e09\u5927\u7279\u6027<\/h3>\n

1. \u5fc5\u987b\u521d\u59cb\u5316：\u58f0\u660e\u5f15\u7528\u65f6\u5fc5\u987b\u7ed1\u5b9a\u5bf9\u8c61，\u4e0d\u80fd\u5355\u72ec\u58f0\u660e（\u5982int& ra; \u7f16\u8bd1\u62a5\u9519）\u3002<\/p>\n

2. \u4e00\u4e2a\u53d8\u91cf\u53ef\u591a\u4e2a\u5f15\u7528：\u540c\u4e00\u53d8\u91cf\u53ef\u88ab\u591a\u4e2a\u5f15\u7528\u522b\u540d\u6307\u5411\u3002<\/p>\n

3. \u5f15\u7528\u4e0d\u53ef\u66f4\u6539\u6307\u5411：\u4e00\u65e6\u7ed1\u5b9a\u67d0\u4e2a\u5bf9\u8c61，\u65e0\u6cd5\u518d\u7ed1\u5b9a\u5176\u4ed6\u5bf9\u8c61（\u540e\u7eed\u8d4b\u503c\u662f\u4fee\u6539\u5bf9\u8c61\u503c，\u800c\u975e\u6539\u6307\u5411）\u3002<\/p>\n

\u2022 \u793a\u4f8b：<\/p>\n

int a = 10;
\nint& b = a;
\nint c = 20;
\nb = c; \u00a0\/\/ \u4e0d\u662f\u6539\u6307\u5411，\u662f\u5c06c\u7684\u503c\u8d4b\u7ed9a（b\u662fa\u7684\u522b\u540d）<\/p>\n

3. \u5f15\u7528\u7684\u4f7f\u7528\u573a\u666f<\/h3>\n

（1）\u5f15\u7528\u4f20\u53c2（\u66ff\u4ee3\u6307\u9488\u4f20\u53c2，\u7b80\u5316\u8bed\u6cd5）<\/p>\n

\u2022 \u4f5c\u7528：\u51fd\u6570\u5185\u4fee\u6539\u5b9e\u53c2，\u907f\u514d\u6307\u9488\u89e3\u5f15\u7528\u7684\u7e41\u7410，\u53ef\u8bfb\u6027\u66f4\u9ad8\u3002<\/p>\n

\u2022 \u793a\u4f8b（\u4ea4\u6362\u51fd\u6570）：<\/p>\n

void Swap(int& rx, int& ry) {
\n\u00a0 \u00a0 int tmp = rx;
\n\u00a0 \u00a0 rx = ry;
\n\u00a0 \u00a0 ry = tmp;
\n}
\nint main() {
\n\u00a0 \u00a0 int x = 0, y = 1;
\n\u00a0 \u00a0 Swap(x, y); \u00a0\/\/ \u76f4\u63a5\u4f20\u53d8\u91cf，\u65e0\u9700\u53d6\u5730\u5740
\n\u00a0 \u00a0 cout << x << " " << y << endl;
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

（2）\u5f15\u7528\u505a\u8fd4\u56de\u503c（\u51cf\u5c11\u62f7\u8d1d，\u63d0\u9ad8\u6548\u7387）<\/p>\n

\u2022 \u4f5c\u7528：\u8fd4\u56de\u5bf9\u8c61\u7684\u522b\u540d，\u907f\u514d\u503c\u8fd4\u56de\u7684\u62f7\u8d1d\u5f00\u9500，\u53ef\u76f4\u63a5\u4fee\u6539\u8fd4\u56de\u5bf9\u8c61\u3002<\/p>\n

\u2022 \u793a\u4f8b（\u6808\u9876\u5143\u7d20\u8fd4\u56de）：<\/p>\n

typedef int STDataType;
\ntypedef struct Stack {
\n\u00a0 \u00a0 STDataType* a;
\n\u00a0 \u00a0 int top;
\n\u00a0 \u00a0 int capacity;
\n} ST;
\n\/\/ \u5f15\u7528\u8fd4\u56de\u6808\u9876\u5143\u7d20，\u53ef\u76f4\u63a5\u4fee\u6539
\nSTDataType& STTop(ST& rs) {
\n\u00a0 \u00a0 return rs.a[rs.top];
\n}
\nint main() {
\n\u00a0 \u00a0 ST st1;
\n\u00a0 \u00a0 STInit(st1);
\n\u00a0 \u00a0 STPush(st1, 1);
\n\u00a0 \u00a0 STTop(st1) += 10; \u00a0\/\/ \u76f4\u63a5\u4fee\u6539\u6808\u9876\u503c
\n\u00a0 \u00a0 cout << STTop(st1) << endl;
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

（3）\u6307\u9488\u5f15\u7528（\u66ff\u4ee3\u4e8c\u7ea7\u6307\u9488，\u7b80\u5316\u94fe\u8868\u64cd\u4f5c）<\/p>\n

\u2022 \u4f5c\u7528：\u7ed9\u6307\u9488\u53d8\u91cf\u53d6\u522b\u540d，\u65e0\u9700\u4e8c\u7ea7\u6307\u9488\u5373\u53ef\u4fee\u6539\u6307\u9488\u672c\u8eab\u3002<\/p>\n

\u2022 \u793a\u4f8b（\u94fe\u8868\u5c3e\u63d2）：<\/p>\n

typedef struct ListNode {
\n\u00a0 \u00a0 int val;
\n\u00a0 \u00a0 struct ListNode* next;
\n} LTNode, *PNode;
\n\/\/ \u6307\u9488\u5f15\u7528phead，\u76f4\u63a5\u4fee\u6539\u5934\u6307\u9488
\nvoid ListPushBack(PNode& phead, int x) {
\n\u00a0 \u00a0 PNode newnode = (PNode)malloc(sizeof(LTNode));
\n\u00a0 \u00a0 newnode->val = x;
\n\u00a0 \u00a0 newnode->next = NULL;
\n\u00a0 \u00a0 if (phead == NULL) {
\n\u00a0 \u00a0 \u00a0 \u00a0 phead = newnode; \u00a0\/\/ \u76f4\u63a5\u4fee\u6539\u5934\u6307\u9488
\n\u00a0 \u00a0 } else {
\n\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u904d\u5386\u5c3e\u63d2\u903b\u8f91…
\n\u00a0 \u00a0 }
\n}
\nint main() {
\n\u00a0 \u00a0 PNode plist = NULL;
\n\u00a0 \u00a0 ListPushBack(plist, 1); \u00a0\/\/ \u76f4\u63a5\u4f20\u6307\u9488，\u65e0\u9700\u4f20\u5730\u5740
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

4. const \u5f15\u7528（\u6743\u9650\u63a7\u5236）<\/h3>\n

（1）\u6838\u5fc3\u89c4\u5219<\/p>\n

\u2022 \u53ef\u5f15\u7528const\u5bf9\u8c61，\u5fc5\u987b\u7528const\u5f15\u7528（\u6743\u9650\u4e0d\u80fd\u653e\u5927）；<\/p>\n

\u2022 const\u5f15\u7528\u53ef\u5f15\u7528\u666e\u901a\u5bf9\u8c61（\u6743\u9650\u7f29\u5c0f，\u5408\u6cd5）\u3002<\/p>\n

（2）\u4e34\u65f6\u5bf9\u8c61\u4e0econst\u5f15\u7528<\/p>\n

\u2022 \u8868\u8fbe\u5f0f\u6c42\u503c\u3001\u7c7b\u578b\u8f6c\u6362\u4f1a\u4ea7\u751f\u4e34\u65f6\u5bf9\u8c61（\u7f16\u8bd1\u5668\u81ea\u52a8\u521b\u5efa\u7684\u672a\u547d\u540d\u5bf9\u8c61，\u5177\u6709\u5e38\u91cf\u6027）；<\/p>\n

\u2022 \u4e34\u65f6\u5bf9\u8c61\u53ea\u80fd\u7528const\u5f15\u7528\u7ed1\u5b9a，\u666e\u901a\u5f15\u7528\u4f1a\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n

\u2022 \u793a\u4f8b：<\/p>\n

const int a = 10;
\n\/\/ int& ra = a; \u00a0\u62a5\u9519：\u6743\u9650\u653e\u5927（const\u2192\u975econst）
\nconst int& ra = a; \u00a0\/\/ \u5408\u6cd5<\/p>\n

int b = 20;
\nconst int& rb = b; \u00a0\/\/ \u5408\u6cd5：\u6743\u9650\u7f29\u5c0f（\u975econst\u2192const）
\n\/\/ rb++; \u00a0\u62a5\u9519：const\u5f15\u7528\u4e0d\u53ef\u4fee\u6539<\/p>\n

\/\/ \u4e34\u65f6\u5bf9\u8c61\u7ed1\u5b9a（\u5fc5\u987b\u7528const\u5f15\u7528）
\nconst int& rb = a * 3; \u00a0\/\/ a*3\u4ea7\u751f\u4e34\u65f6\u5bf9\u8c61，const\u5f15\u7528\u7ed1\u5b9a
\ndouble d = 12.34;
\nconst int& rd = d; \u00a0 \u00a0 \u00a0\/\/ \u7c7b\u578b\u8f6c\u6362\u4ea7\u751f\u4e34\u65f6\u5bf9\u8c61，const\u5f15\u7528\u7ed1\u5b9a<\/p>\n

5. \u5f15\u7528\u4e0e\u6307\u9488\u7684\u6838\u5fc3\u533a\u522b<\/h3>\n\n\n\n\n\n\n\n\n\n
\u5bf9\u6bd4\u7ef4\u5ea6<\/td>\n\u5f15\u7528<\/td>\n\u6307\u9488<\/td>\n<\/tr>\n
\u5185\u5b58\u5360\u7528<\/td>\n\u4e0d\u5f00\u8f9f\u72ec\u7acb\u5185\u5b58，\u5171\u7528\u5bf9\u8c61\u5185\u5b58<\/td>\n\u5f00\u8f9f\u72ec\u7acb\u5185\u5b58（\u5b58\u5730\u5740）\u00a0<\/td>\n<\/tr>\n
\u521d\u59cb\u5316<\/td>\n\u5fc5\u987b\u521d\u59cb\u5316<\/td>\n\u53ef\u58f0\u660e\u540e\u8d4b\u503c（\u8bed\u6cd5\u4e0d\u5f3a\u5236）\u00a0<\/td>\n<\/tr>\n
\u6307\u5411\u4fee\u6539<\/td>\n\u7ed1\u5b9a\u540e\u4e0d\u53ef\u6539\u6307\u5411<\/td>\n\u53ef\u968f\u65f6\u6539\u6307\u5411<\/td>\n<\/tr>\n
\u8bbf\u95ee\u65b9\u5f0f<\/td>\n\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61，\u65e0\u9700\u89e3\u5f15\u7528<\/td>\n\u9700\u89e3\u5f15\u7528（*）\u8bbf\u95ee\u5bf9\u8c61\u00a0<\/td>\n<\/tr>\n
\u7a7a\u503c<\/td>\n\u65e0\u7a7a\u5f15\u7528，\u66f4\u5b89\u5168<\/td>\n\u53ef\u6307\u5411NULL\/nullptr，\u6613\u51fa\u7a7a\u6307\u9488\u00a0<\/td>\n<\/tr>\n
sizeof\u7ed3\u679c<\/td>\n\u5f15\u7528\u7c7b\u578b\u7684\u5927\u5c0f（\u5982int&\u21924）<\/td>\n\u5730\u5740\u7a7a\u95f4\u5927\u5c0f（32\u4f4d4\/64\u4f4d8）\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8c\u3001inline \u5173\u952e\u5b57（\u5185\u8054\u51fd\u6570）<\/h2>\n

1. \u6838\u5fc3\u6982\u5ff5<\/h3>\n

\u2022 \u5b9a\u4e49：inline\u4fee\u9970\u7684\u51fd\u6570\u4e3a\u5185\u8054\u51fd\u6570，\u7f16\u8bd1\u65f6\u7f16\u8bd1\u5668\u4f1a\u5728\u8c03\u7528\u5904\u76f4\u63a5\u5c55\u5f00\u51fd\u6570\u4f53，\u907f\u514d\u51fd\u6570\u8c03\u7528\u7684\u6808\u5e27\u5f00\u9500，\u63d0\u9ad8\u6267\u884c\u6548\u7387\u3002<\/p>\n

\u2022 \u672c\u8d28：\u662f\u7f16\u8bd1\u5668\u5efa\u8bae，\u800c\u975e\u5f3a\u5236\u547d\u4ee4\u2014\u2014\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u51fd\u6570\u590d\u6742\u5ea6（\u5982\u4ee3\u7801\u957f\u5ea6\u3001\u662f\u5426\u9012\u5f52）\u51b3\u5b9a\u662f\u5426\u5c55\u5f00，C++\u6807\u51c6\u65e0\u5f3a\u5236\u5c55\u5f00\u89c4\u5219\u3002<\/p>\n

2. \u9002\u7528\u573a\u666f<\/h3>\n

\u2022 \u9002\u5408：\u9891\u7e41\u8c03\u7528\u3001\u4ee3\u7801\u7b80\u77ed\u7684\u51fd\u6570（\u5982\u7b80\u5355\u7684\u52a0\u51cf\u3001\u53d6\u503c\u51fd\u6570）；<\/p>\n

\u2022 \u4e0d\u9002\u5408：\u9012\u5f52\u51fd\u6570\u3001\u4ee3\u7801\u5197\u957f\u7684\u51fd\u6570（\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5ffd\u7565inline）\u3002<\/p>\n

3. \u4e0eC\u8bed\u8a00\u5b8f\u51fd\u6570\u7684\u5bf9\u6bd4<\/h3>\n

\u2022 \u5b8f\u51fd\u6570：\u9884\u5904\u7406\u9636\u6bb5\u6587\u672c\u66ff\u6362，\u65e0\u7c7b\u578b\u68c0\u67e5，\u6613\u51fa\u9519（\u5982\u62ec\u53f7\u7f3a\u5931\u5bfc\u81f4\u8fd0\u7b97\u4f18\u5148\u7ea7\u95ee\u9898）；<\/p>\n

\u2022 inline\u51fd\u6570：\u7f16\u8bd1\u9636\u6bb5\u5904\u7406，\u6709\u7c7b\u578b\u5b89\u5168\u68c0\u67e5，\u8bed\u6cd5\u4e0e\u666e\u901a\u51fd\u6570\u4e00\u81f4，\u66ff\u4ee3\u5b8f\u51fd\u6570\u66f4\u5b89\u5168\u3002<\/p>\n

\u2022 \u5b8f\u51fd\u6570\u6613\u9519\u793a\u4f8b：<\/p>\n

\/\/ \u9519\u8bef\u5b8f（\u65e0\u62ec\u53f7，\u4f18\u5148\u7ea7\u95ee\u9898）
\n#define ADD(a,b) a+b
\ncout << ADD(1,2)*5 << endl; \u00a0\/\/ \u5c55\u5f00\u4e3a1+2*5=11，\u4e0d\u7b26\u5408\u9884\u671f
\n\/\/ \u6b63\u786e\u5b8f（\u52a0\u62ec\u53f7\u4fdd\u8bc1\u4f18\u5148\u7ea7）
\n#define ADD(a,b) ((a)+(b))
\ncout << ADD(1,2)*5 << endl; \u00a0\/\/ \u5c55\u5f00\u4e3a(1+2)*5=15，\u7b26\u5408\u9884\u671f<\/p>\n

4. inline\u51fd\u6570\u7684\u4f7f\u7528\u89c4\u8303<\/h3>\n

1. \u58f0\u660e\u4e0e\u5b9a\u4e49\u4e0d\u5206\u79bb：\u82e5\u5c06inline\u51fd\u6570\u58f0\u660e\u653e\u5934\u6587\u4ef6\u3001\u5b9a\u4e49\u653e\u6e90\u6587\u4ef6，\u94fe\u63a5\u65f6\u4f1a\u62a5\u201c\u65e0\u6cd5\u89e3\u6790\u5916\u90e8\u7b26\u53f7\u201d（\u5185\u8054\u5c55\u5f00\u540e\u65e0\u51fd\u6570\u5730\u5740，\u94fe\u63a5\u5668\u627e\u4e0d\u5230\u5b9a\u4e49）\u3002<\/p>\n

\u25e6 \u9519\u8bef\u793a\u4f8b：<\/p>\n

\/\/ F.h（\u58f0\u660e）
\ninline void f(int i);
\n\/\/ F.cpp（\u5b9a\u4e49）
\nvoid f(int i) { cout << i << endl; }
\n\/\/ main.cpp（\u8c03\u7528）
\n#include "F.h"
\nf(10); \u00a0\/\/ \u94fe\u63a5\u62a5\u9519：\u65e0\u6cd5\u89e3\u6790\u5916\u90e8\u7b26\u53f7<\/p>\n

2. Debug\u6a21\u5f0f\u9ed8\u8ba4\u4e0d\u5c55\u5f00：VS\u7b49\u7f16\u8bd1\u5668\u7684Debug\u7248\u672c\u4e3a\u65b9\u4fbf\u8c03\u8bd5，\u9ed8\u8ba4\u5173\u95edinline\u5c55\u5f00，Release\u7248\u672c\u81ea\u52a8\u5f00\u542f\u3002<\/p>\n

5. \u4ee3\u7801\u793a\u4f8b<\/p>\n

#include <iostream>
\nusing namespace std;
\n\/\/ \u5185\u8054\u51fd\u6570：\u7b80\u5355\u52a0\u6cd5，\u9002\u5408\u5c55\u5f00
\ninline int Add(int x, int y) {
\n\u00a0 \u00a0 int ret = x + y;
\n\u00a0 \u00a0 ret += 1;
\n\u00a0 \u00a0 return ret;
\n}
\nint main() {
\n\u00a0 \u00a0 int ret = Add(1, 2); \u00a0\/\/ \u7f16\u8bd1\u65f6\u76f4\u63a5\u5c55\u5f00\u4e3aint ret=1+2+1;
\n\u00a0 \u00a0 cout << ret << endl;
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

\u4e09\u3001nullptr（C++11\u7a7a\u6307\u9488\u5173\u952e\u5b57）<\/h2>\n

1. \u4f20\u7edfNULL\u7684\u7f3a\u9677<\/h3>\n

\u2022 \u672c\u8d28：NULL\u662f\u5b8f，C++\u4e2d\u5b9a\u4e49\u4e3a0，C\u4e2d\u5b9a\u4e49\u4e3a(void*)0；<\/p>\n

\u2022 \u95ee\u9898：\u51fd\u6570\u91cd\u8f7d\u65f6，NULL\u4f1a\u88ab\u4f18\u5148\u5339\u914dint\u53c2\u6570\u7248\u672c，\u800c\u975e\u6307\u9488\u7248\u672c，\u8fdd\u80cc\u7a7a\u6307\u9488\u4f7f\u7528\u521d\u8877\u3002<\/p>\n

\u2022 \u793a\u4f8b：<\/p>\n

void f(int x) { cout << "f(int x)" << endl; }
\nvoid f(int* ptr) { cout << "f(int* ptr)" << endl; }
\nint main() {
\n\u00a0 \u00a0 f(NULL); \u00a0\/\/ \u5339\u914df(int x)，\u800c\u975e\u9884\u671f\u7684f(int* ptr)
\n\u00a0 \u00a0 f((int*)NULL); \u00a0\/\/ \u5f3a\u5236\u8f6c\u6362\u624d\u80fd\u5339\u914d\u6307\u9488\u7248\u672c，\u7e41\u7410
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

2. nullptr\u7684\u4f18\u52bf<\/h3>\n

\u2022 \u7c7b\u578b：C++11\u65b0\u589e\u5173\u952e\u5b57，\u662f\u7279\u6b8a\u6307\u9488\u7c7b\u578b\u5b57\u9762\u503c，\u53ea\u80fd\u9690\u5f0f\u8f6c\u6362\u4e3a\u4efb\u610f\u6307\u9488\u7c7b\u578b，\u4e0d\u80fd\u8f6c\u6362\u4e3a\u6574\u6570\u7c7b\u578b；<\/p>\n

\u2022 \u4f5c\u7528：\u5b8c\u7f8e\u8868\u793a\u7a7a\u6307\u9488，\u907f\u514dNULL\u7684\u7c7b\u578b\u6b67\u4e49，\u91cd\u8f7d\u65f6\u4f18\u5148\u5339\u914d\u6307\u9488\u53c2\u6570\u3002<\/p>\n

\u2022 \u793a\u4f8b：<\/p>\n

void f(int x) { cout << "f(int x)" << endl; }
\nvoid f(int* ptr) { cout << "f(int* ptr)" << endl; }
\nint main() {
\n\u00a0 \u00a0 f(nullptr); \u00a0\/\/ \u76f4\u63a5\u5339\u914df(int* ptr)，\u65e0\u9700\u5f3a\u5236\u8f6c\u6362
\n\u00a0 \u00a0 return 0;
\n}<\/p>\n

3. \u6838\u5fc3\u89c4\u5219<\/h3>\n

\u2022 nullptr\u662f\u6307\u9488\u7c7b\u578b，NULL\u662f\u6574\u65700（C++）；<\/p>\n

\u2022 \u7a7a\u6307\u9488\u5b9a\u4e49\u4f18\u5148\u7528nullptr，\u66ff\u4ee3NULL，\u907f\u514d\u7c7b\u578b\u6b67\u4e49\u3002<\/p>\n

\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e00\u3001\u5f15\u7528（&）1. \u5f15\u7528\u7684\u6982\u5ff5\u548c\u5b9a\u4e49\u2022 \u672c\u8d28：\u7ed9\u5df2\u5b58\u5728\u7684\u53d8\u91cf\u53d6\u522b\u540d，\u7f16\u8bd1\u5668\u4e0d\u4f1a\u4e3a\u5f15\u7528\u53d8\u91cf\u5f00\u8f9f\u72ec\u7acb\u5185\u5b58\u7a7a\u95f4，\u4e0e\u5f15\u7528\u5bf9\u8c61\u5171\u7528\u540c\u4e00\u5757\u5185\u5b58\u3002\u2022 \u8bed\u6cd5\u683c\u5f0f：\u7c7b\u578b& \u5f15\u7528\u522b\u540d \u5f15\u7528\u5bf9\u8c61;\u2022 \u793a\u4f8b：int a 0;
\nint& b a; \u00a0\/\/ b\u662fa\u7684\u522b\u540d
\nint& c a; \u00a0\/\/ \u4e00\u4e2a\u53d8\u91cf\u53ef\u591a\u4e2a\u5f15\u7528
\nint& d b; \u00a0\/\/ \u7ed9\u522b\u540d\u53d6\u522b\u540d，\u6700\u7ec8\u4ecd\u6307\u5411a
\nd; \u00a0 <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,371,190,305,124],"topic":[],"class_list":["post-73014","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-371","tag-190","tag-305","tag-124"],"yoast_head":"\nC++\u5165\u95e8\uff082\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/73014.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++\u5165\u95e8\uff082\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e00\u3001\u5f15\u7528（&）1. \u5f15\u7528\u7684\u6982\u5ff5\u548c\u5b9a\u4e49\u2022 \u672c\u8d28：\u7ed9\u5df2\u5b58\u5728\u7684\u53d8\u91cf\u53d6\u522b\u540d，\u7f16\u8bd1\u5668\u4e0d\u4f1a\u4e3a\u5f15\u7528\u53d8\u91cf\u5f00\u8f9f\u72ec\u7acb\u5185\u5b58\u7a7a\u95f4，\u4e0e\u5f15\u7528\u5bf9\u8c61\u5171\u7528\u540c\u4e00\u5757\u5185\u5b58\u3002\u2022 \u8bed\u6cd5\u683c\u5f0f：\u7c7b\u578b& \u5f15\u7528\u522b\u540d \u5f15\u7528\u5bf9\u8c61;\u2022 \u793a\u4f8b：int a 0; 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