Question

test_function()           
{                
var=$1          
echo "**$var**" 
var2="bb 6"    
return $var2     
}                

return_val=`test_function "aa 3" `
echo $return_val

我需要将非数字字符传递给函数并从函数返回非数字值。上面的代码失败了。请帮忙。

Answer 1

试试这个

function test_function()           
{                
var=$1          
echo "**$var**" 
var2="bb 6"    
echo $var2     
}                

return_val=$( test_function "aa 3" )
echo $return_val

Answer 2

您可以使用eval命令将值返回到参数output

test_function()
{
    input=$1;
    echo "**$input**"
    var_out="bb 6" 

    eval "$2=\"$var_out\""
}

test_function "This is input" output 

echo $output;

Answer 3

return用于返回函数状态代码，它必须后跟一个整数调用函数后，你可以使用$？获取状态代码

$ help return
return: return [n]
    Return from a shell function.

    Causes a function or sourced script to exit with the return value
    specified by N.  If N is omitted, the return status is that of the
    last command executed within the function or script.

    Exit Status:
    Returns N, or failure if the shell is not executing a function or script.

如果您想获取var2的值，则应使用echo $var2代替return $var2

传递非数字参数并从shell函数返回非数值

3 个答案: