source: src/examples/searchsort.c @ d5f1cfc

//                               -*- Mode: C -*- 
// 
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
// 
// searchsort.c -- 
// 
// Author           : Peter A. Buhr
// Created On       : Thu Feb  4 18:17:50 2016
// Last Modified By : Peter A. Buhr
// Last Modified On : Tue Mar 22 22:16:46 2016
// Update Count     : 55
// 

#include <fstream>
#include <stdlib>                                                                               // bsearch, qsort

int main( void ) {
        const unsigned int size = 10;
        int iarr[size];

        for ( unsigned int i = 0; i < size; i += 1 ) {
                iarr[i] = size - i;
                sout | iarr[i] | ", ";
        } // for
        sout | endl;
        qsort( iarr, size );
        for ( unsigned int i = 0; i < size; i += 1 ) {
                sout | iarr[i] | ", ";
        } // for
        sout | endl;
        for ( unsigned int i = 0; i < size; i += 1 ) {
                int *v = bsearch( size - i, iarr, size );
                sout | *v | ", ";
        } // for
        sout | endl | endl;

        // descending sort/search by changing < to >
        for ( unsigned int i = 0; i < size; i += 1 ) {
                iarr[i] = i + 1;
                sout | iarr[i] | ", ";
        } // for
        sout | endl;
        {
                int ?<?( int x, int y ) { return x > y; }
                qsort( iarr, size );
                for ( unsigned int i = 0; i < size; i += 1 ) {
                        sout | iarr[i] | ", ";
                } // for
                sout | endl;
                for ( unsigned int i = 0; i < size; i += 1 ) {
                        int *v = bsearch( size - i, iarr, size );
                        sout | *v | ", ";
                } // for
        }
        sout | endl | endl;

        double darr[size];
        for ( unsigned int i = 0; i < size; i += 1 ) {
                darr[i] = size - i + 0.5;
                sout | darr[i] | ", ";
        } // for
        sout | endl;
        qsort( darr, size );
        for ( unsigned int i = 0; i < size; i += 1 ) {
                sout | darr[i] | ", ";
        } // for
        sout | endl;
        for ( unsigned int i = 0; i < size; i += 1 ) {
                double *v = bsearch( size - i + 0.5, darr, size );
                sout | *v | ", ";
        } // for
        sout | endl | endl;

        struct S { int i, j; } sarr[size];
        int ?<?( S t1, S t2 ) { return t1.i < t2.i && t1.j < t2.j; }
        ofstream * ?|?( ofstream * os, S v ) { return os | v.i | ' ' | v.j; }
        for ( unsigned int i = 0; i < size; i += 1 ) {
                sarr[i].i = size - i;
                sarr[i].j = size - i + 1;
                sout | sarr[i] | ", ";
        } // for
        sout | endl;
        qsort( sarr, size );
        for ( unsigned int i = 0; i < size; i += 1 ) {
                sout | sarr[i] | ", ";
        } // for
        sout | endl;
        for ( unsigned int i = 0; i < size; i += 1 ) {
                S temp = { size - i, size - i + 1 };
                S *v = bsearch( temp, sarr, size );
                sout | *v | ", ";
        } // for
        sout | endl | endl;
} // main

// Local Variables: //
// tab-width: 4 //
// compile-command: "cfa searchsort.c" //
// End: //