90 lines
1.4 KiB
C++
90 lines
1.4 KiB
C++
/*
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* Bubble sort a list of 10 integers
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*
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* I'd rather have the method without pointers.
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* As a user of the function, I don't have to think about passing pointers, which is also nice
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*/
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#include <iostream>
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#define LIST_SIZE 10
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#define USE_PTR 1
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void sort( int* A, const int size );
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#if !USE_PTR
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void order( int& a, int& b );
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#else
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void orderptr( int* a, int* b );
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#endif
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int main() {
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int list[LIST_SIZE] = { 2295, 14500, 9127, 23079, 20612, 5571, 21959, 10032, 18339, 16673 };
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// Print the original
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std::cout << "Original: ";
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for( int i = 0; i < LIST_SIZE ; i++ )
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{
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if ( i != 0 )
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{
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std::cout << ", ";
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}
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std::cout << list[i];
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}
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std::cout << std::endl;
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// sort it
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sort( list, LIST_SIZE );
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// Print it
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std::cout << "Sorted: ";
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for( int i = 0; i < LIST_SIZE ; i++ )
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{
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if ( i != 0 )
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{
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std::cout << ", ";
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}
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std::cout << list[i];
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}
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std::cout << std::endl;
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return 0;
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}
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void sort( int* A, const int size ) {
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for (int i = 0 ; i < size ; i++ ) {
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for (int j = 0 ; j < size - 1 ; j++) {
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#if !USE_PTR
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order( A[ i ], A[ j ] );
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#else
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orderptr( &A[ i ], &A[ j ] );
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#endif
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}
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}
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}
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#if !USE_PTR
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void order( int& a, int& b ) {
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// b is greater or equal to a, do nothing
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if ( a < b ) {
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return;
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}
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int tmp = a;
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a = b;
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b = tmp;
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}
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#else
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void orderptr( int* a, int* b ) {
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if ( *a < *b ) {
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return;
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}
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int tmp = *a;
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*a = *b;
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*b = tmp;
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}
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#endif
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