\u4e0b\u9762\u8be6\u7ec6\u8bb2\u89e3C++\u4e2d\u7684\u547d\u540d\u7a7a\u95f4（namespace）\u6982\u5ff5：<\/p>\n
\u547d\u540d\u7a7a\u95f4\u7528\u4e8e\u89e3\u51b3\u547d\u540d\u51b2\u7a81\u95ee\u9898\u3002\u5728\u5927\u578b\u9879\u76ee\u4e2d，\u4e0d\u540c\u5e93\u53ef\u80fd\u5b9a\u4e49\u540c\u540d\u53d8\u91cf\/\u51fd\u6570，\u4f8b\u5982：<\/p>\n
\/\/ \u5e93A
\nvoid print() { \/*…*\/ }<\/p>\n
\/\/ \u5e93B
\nvoid print() { \/*…*\/ } \/\/ \u7f16\u8bd1\u9519\u8bef：\u91cd\u5b9a\u4e49<\/p>\n
\u901a\u8fc7\u547d\u540d\u7a7a\u95f4\u9694\u79bb：<\/p>\n
namespace LibA {
\n void print() { \/*…*\/ }
\n}<\/p>\n
namespace LibB {
\n void print() { \/*…*\/ }
\n}<\/p>\n
\u8bed\u6cd5：<\/p>\n
namespace \u540d\u79f0 {
\n \/\/ \u53d8\u91cf\u3001\u51fd\u6570\u3001\u7c7b\u7b49
\n}<\/p>\n
\u793a\u4f8b：<\/p>\n
namespace Math {
\n const double PI = 3.14159;
\n double square(double x) { return x * x; }
\n}<\/p>\n
double circle_area = Math::PI * Math::square(r);<\/p>\n
int main() {
\n using Math::PI; \/\/ \u4ec5\u5f15\u5165PI
\n double area = PI * r * r;
\n}<\/p>\n
using namespace Math; \/\/ \u5f15\u5165\u6574\u4e2a\u547d\u540d\u7a7a\u95f4
\ndouble area = PI * square(r);<\/p>\n
\u6ce8\u610f：\u5728\u5934\u6587\u4ef6\u4e2d\u907f\u514d\u4f7f\u7528using namespace，\u4ee5\u514d\u6c61\u67d3\u5168\u5c40\u4f5c\u7528\u57df\u3002<\/p>\n
\u652f\u6301\u591a\u5c42\u5d4c\u5957：<\/p>\n
namespace Project {
\n namespace IO {
\n void save() { \/*…*\/ }
\n }
\n}
\n\/\/ \u4f7f\u7528
\nProject::IO::save();<\/p>\n
\u7528\u4e8e\u9650\u5236\u4f5c\u7528\u57df\u81f3\u5f53\u524d\u6587\u4ef6（\u7c7b\u4f3cstatic）：<\/p>\n
namespace { \/\/ \u4ec5\u5f53\u524d.cpp\u6587\u4ef6\u53ef\u89c1
\n int local_var = 42;
\n}<\/p>\n
#include <iostream><\/p>\n
namespace Geometry {
\n const double PI = 3.1415926;
\n double area(double radius) {
\n return PI * radius * radius;
\n }
\n}<\/p>\n
int main() {
\n double r = 5.0;
\n std::cout << "\u5706\u9762\u79ef: " << Geometry::area(r) << std::endl;
\n return 0;
\n}<\/p>\n
\u8f93\u51fa：<\/p>\n
\u5706\u9762\u79ef: 78.5398<\/p>\n
\u901a\u8fc7\u547d\u540d\u7a7a\u95f4\u7ec4\u7ec7\u4ee3\u7801，\u53ef\u663e\u8457\u63d0\u5347\u53ef\u7ef4\u62a4\u6027\u548c\u534f\u4f5c\u6548\u7387！<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e0b\u9762\u8be6\u7ec6\u8bb2\u89e3C\u4e2d\u7684\u547d\u540d\u7a7a\u95f4（namespace）\u6982\u5ff5： 1. \u547d\u540d\u7a7a\u95f4\u7684\u4f5c\u7528
\n\u547d\u540d\u7a7a\u95f4\u7528\u4e8e\u89e3\u51b3\u547d\u540d\u51b2\u7a81\u95ee\u9898\u3002\u5728\u5927\u578b\u9879\u76ee\u4e2d，\u4e0d\u540c\u5e93\u53ef\u80fd\u5b9a\u4e49\u540c\u540d\u53d8\u91cf\/\u51fd\u6570，\u4f8b\u5982：
\n\/\/ \u5e93A
\nvoid print() { \/*…*\/ }\/\/ \u5e93B
\nvoid print() { \/*…*\/ } \/\/ \u7f16\u8bd1\u9519\u8bef：\u91cd\u5b9a\u4e49\u901a\u8fc7\u547d\u540d\u7a7a\u95f4\u9694\u79bb：
\nnamespace LibA {voi<\/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":[55,190],"topic":[],"class_list":["post-65954","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-190"],"yoast_head":"\n