$a = rand(1,5);
if($a == 1){
echo 'You got 1';
}elseif($a == 2){
echo 'You got 2';
}elseif($a == 3){
echo 'You got 3';
}elseif($a == 4){
echo 'You got 4';
}else{
echo 'You got 5';
}
switch ($a) {
case '1':
echo 'You got 1';
break;
case '2':
echo 'You got 2';
break;
.......//此处把3、4的情况加进去
default:
echo 'You got 5';
break;
}
$sum = 0;
for($i = 1; $i <= 100; $i++){
$sum += $i;
}
echo $sum;
$sum = 0;
$i = 1;
while ($i <= 100) {
$sum += $i;
$i++;
}
echo $sum;
$sum = 0;
do{
$sum += $i;
$i++;
}while ($i <= 100);
echo $sum;
三、(1) $sum = 0;
function sum($a,$b){
$sum = $a + $b;
return $sum;
}
(2) function sum($a,$b=100){
$sum = $a + $b;
return $sum;
}
(3) function sum($a,$b){
global $sum;
$sum = $a + $b;
}
if($a == 1){
echo 'You got 1';
}elseif($a == 2){
echo 'You got 2';
}elseif($a == 3){
echo 'You got 3';
}elseif($a == 4){
echo 'You got 4';
}else{
echo 'You got 5';
}
switch ($a) {
case '1':
echo 'You got 1';
break;
case '2':
echo 'You got 2';
break;
.......//此处把3、4的情况加进去
default:
echo 'You got 5';
break;
}
$sum = 0;
for($i = 1; $i <= 100; $i++){
$sum += $i;
}
echo $sum;
$sum = 0;
$i = 1;
while ($i <= 100) {
$sum += $i;
$i++;
}
echo $sum;
$sum = 0;
do{
$sum += $i;
$i++;
}while ($i <= 100);
echo $sum;
三、(1) $sum = 0;
function sum($a,$b){
$sum = $a + $b;
return $sum;
}
(2) function sum($a,$b=100){
$sum = $a + $b;
return $sum;
}
(3) function sum($a,$b){
global $sum;
$sum = $a + $b;
}
解决方案 »
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