36 lines
1.0 KiB
PHP
36 lines
1.0 KiB
PHP
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<html>
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<head><title>Masodfoku</title></head>
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<body>
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<form method="post">
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a<input type="number" name="a"><br>
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b<input type="number" name="b"><br>
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c<input type="number" name="c"><br>
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<input type="submit" name="submit">
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</form>
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<?php
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$a = $_POST["a"];
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$b = $_POST["b"];
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$c = $_POST["c"];
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$d = -1;
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if($a == 0 && $b == 0 && $c == 0){
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echo "azonossag";
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}elseif($a == 0 && $b == 0 && $c != 0){
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echo "ellentmondas";
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}elseif($a == 0 && $b != 0 && $c != 0){
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$x = -($c/$b);
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echo "\n.$x";
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}elseif($a != 0){
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$d = ($b * $b) - (4 * $a * $c);
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}
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if($d > 0){
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echo "\nkét megoldás van";
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}elseif($d == 0){
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echo "\negy megoldás van";
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}else{
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echo "\nnincs megoldas";
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}
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?>
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</body>
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</html>
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