在CGI脚本中只打印两位小数的位置值

Question

print <<here; 
<div align="center"> 
<h2>Grades</h2> 
<table border ="2" bordercolor="green"> 
    <tr> 
    <td>Name</td><td>Id#</td><td>Test 1</td><td>Test 2</td><td>Test 3</td><td>Average</td> 
    </tr> 
here 

my @record = $sql->fetchrow_array; ### there is only one row in resultset 

for(my $i = 0; $i < @record; $i++) { 
    print "<td>$record[$i]</td>"; 
} 
"<td>$avg \%.2f</td>"; 
print "</tr>"; 
print "</table></div></body></html>"; 

我在将$avg打印到只有两位小数时遇到问题。

Answer 1

使用printf()使用特定的格式打印数字：

printf("<td>%0.2f</td>\n", $avg);