// a+b >c a+c >b b+c >a
var a, b, c;
var i=0;
do{
if(i>0){
alert("Zle dane");
}
a = prompt("Liczba 1 : ");
b = prompt("Liczba 2 : ");
c = prompt("Liczba 3 : ");
if (parseInt(a) && parseInt(b) && parseInt(c)) {
a = parseInt(a);
b = parseInt(b);
c = parseInt(c);
}
i++;
}while(a+b<=c || a+c<=b || b+c<=a);
var obwod, pole, p;
obwod = (a+b+c);
p = (obwod/2);
pole = Math.sqrt(p*(p-a)*(p-b)*(p-c));
alert(a+" "+b+" "+c+"\nPole: "+pole.toFixed(3)+"\nObowd: "+obwod);
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}