php练习题

Posted 2020-10-09 God is Love

<!------------------九九乘法表-------------------->
<?php 
for($i=1;$i<=9;$i++){

    for($j=1;$j<=$i;$j++){
    echo $j.‘*‘.$i."=".$i*$j."&nbsp&nbsp"; 
    }
    echo "<br>";
}
    echo "<br>";    echo "<br>";    echo "<br>";    echo "<br>";
?>
<!------------------过路费-------------------->
<?php 
$n=0;
$m=100000;
while($m>50000){
$m*=0.95;
$n++;
}echo "<br>";    
while($m>5000)
{    $m-=5000;
    $n++;}
echo "总共经过".$n."次路口";
echo "<br>";    echo "<br>";    echo "<br>";    
?>
<!------------------金字塔-------------------->
<?php
echo "第一种金字塔<br>";    
$a=10;
for($i=1;$i<=$a;$i++){
for($j=1;$j<=$i;$j++){
echo "*";}
echo "<br>";    
}echo "<br>";    ?>

<?php
echo "第二种金字塔<br>";    
$a=10;
for($i=1;$i<=$a;$i++){
for($j=$a;$j>=$i;$j--){
echo "*";}
echo "<br>";    
}echo "<br>";    
?>
<?php
echo "第三种金字塔<br>";    
$a=5;
for($i=1;$i<=$a;$i++){
    for($j=$a;$j>$i;$j--){
            echo"&nbsp;";}    
    for($k=1;$k<=2*$i-1;$k++){    
            echo "*";    }
echo "<br>";    
};    echo "<br>"
?>

<?php
echo "第四种金字塔<br>";    
$a=5;
for($i=$a;$i>0;$i--){
    for($j=1;$j<=$a-$i;$j++){
            echo"&nbsp;";}    
    for($k=1;$k<$i*2;$k++){    
            echo "*";    }
echo "<br>";    
};    echo "<br>";
?>
<!------------------百鸡-------------------->
<?php
//公鸡最多20只，母鸡最多33，小鸡最多100；
//公鸡5块，母鸡3块，小鸡1块3个
for($g=1;$g<=20;$g++){
    for($m=1;$m<=33;$m++){
        $x=(100-$m-$g);
        if((5*$g)+(3*$m)+$x/3==100){
        echo "公鸡的数量为".$g."&nbsp;&nbsp;";
        echo "母鸡的数量为".$m."&nbsp;&nbsp;";
        echo "小鸡的数量为".$x."&nbsp;&nbsp;";
        echo "<br>";}
        }
}
?>
<!------------------百鸡-------------------->