function [y] = ssqr(x)
    // SSQR. Signed square.
    //  Author:D. A. Gutz
    //  Written:22-Jun-92
    //  Revisions:None.
    //  Input:
    //  xReal number.
    //  Output:
    //  ysign(x) * x^2
    // Copyright (C) 2018 - Dave Gutz
    //
    // Permission is hereby granted, free of charge, to any person obtaining a copy
    // of this software and associated documentation files (the "Software"), to deal
    // in the Software without restriction, including without limitation the rights
    // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    // copies of the Software, and to permit persons to whom the Software is
    // furnished to do so, subject to the following conditions:
    //
    // The above copyright notice and this permission notice shall be included in all
    // copies or substantial portions of the Software.
    //
    // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    // SOFTWARE.
    // Sep 26, 2018 	DA Gutz		Created
    // 
    //**********************************************************************

    // Output variables initialisation (not found in input variables)
    y=[];

    // Display mode
    mode(0);

    // Display warning for floating point exception
    ieee(1);

    y = sign(x) * x^2;
endfunction
