diff --git a/basic/sorting/BubbleSort/README.md b/basic/sorting/BubbleSort/README.md index 02c8f07092454..98171a7f90c60 100644 --- a/basic/sorting/BubbleSort/README.md +++ b/basic/sorting/BubbleSort/README.md @@ -93,7 +93,78 @@ func main() { } ``` - +### **C++** +```c++ +#include +#include +#include + +using namespace std; + +/* 简单版本 */ +void bubblesort( vector & vec ) +{ + for ( int i = 0; i < vec.size() - 1; i++ ) + { + for ( int j = 0; j < vec.size() - i - 1; j++ ) + { + if ( vec[j] > vec[j + 1] ) + { + swap( vec[j], vec[j + 1] ); + } + } + } +} + + +/* 改进版本 */ +void bubblesort1( vector & vec ) +{ + for ( int i = 0; i < vec.size() - 1; i++ ) + { + bool exchange = false; + for ( int j = 0; j < vec.size() - i - 1; j++ ) + { + if ( vec[j] > vec[j + 1] ) + { + swap( vec[j], vec[j + 1] ); + exchange = true; + } + } + + if ( !exchange ) + { + break; + } + } +} + + +void printvec( const vector & vec, const string & strbegin = "", const string & strend = "" ) +{ + cout << strbegin << endl; + for ( auto val : vec ) + { + cout << val << "\t"; + } + + cout << endl; + cout << strend << endl; +} + + +int main( void ) +{ + vector vec = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }; + printvec( vec ); + + bubblesort1( vec ); + + printvec( vec, "after sort", "" ); +} + + +``` ## 算法分析 diff --git a/basic/sorting/BubbleSort/bubblesort.cpp b/basic/sorting/BubbleSort/bubblesort.cpp new file mode 100644 index 0000000000000..4f8f0474414e0 --- /dev/null +++ b/basic/sorting/BubbleSort/bubblesort.cpp @@ -0,0 +1,69 @@ +#include +#include +#include + +using namespace std; + +/* 简单版本 */ +void bubblesort( vector & vec ) +{ + for ( int i = 0; i < vec.size() - 1; i++ ) + { + for ( int j = 0; j < vec.size() - i - 1; j++ ) + { + if ( vec[j] > vec[j + 1] ) + { + swap( vec[j], vec[j + 1] ); + } + } + } +} + + +/* 改进版本 */ +void bubblesort1( vector & vec ) +{ + for ( int i = 0; i < vec.size() - 1; i++ ) + { + bool exchange = false; + for ( int j = 0; j < vec.size() - i - 1; j++ ) + { + if ( vec[j] > vec[j + 1] ) + { + swap( vec[j], vec[j + 1] ); + exchange = true; + } + } + + if ( !exchange ) + { + break; + } + } +} + + +void printvec( const vector & vec, const string & strbegin = "", const string & strend = "" ) +{ + cout << strbegin << endl; + for ( auto val : vec ) + { + cout << val << "\t"; + } + + cout << endl; + cout << strend << endl; +} + + +int main( void ) +{ + vector vec = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 }; + printvec( vec ); + + bubblesort1( vec ); + + printvec( vec, "after sort", "" ); +} + +