Linux Foreach loop赢了'；跑不动

家庭作业是修改这个脚本，将exec作为参数，但首先我希望能够运行这个脚本，尝试找出如何修改它

tcsh $ cat foreach_1
#!/bin/tcsh
# routine to zero-fill argv to 20 arguments
#

set buffer = (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)
set count = 1
#
if ($#argv > 20) goto toomany
#
foreach argument ($argv[*])
set buffer[$count] = $argument
@ count++
end
# REPLACE command ON THE NEXT LINE WITH
# THE PROGRAM YOU WANT TO CALL.
exec command $buffer[*]
#
toomany:
echo "Too many arguments given."
echo "Usage: foreach_1 [up to 20 arguments]"
exit 1

但我在尝试运行它时遇到以下错误：

./foreach_1: line 5: syntax error near unexpected token `('
./foreach_1: line 5: `set buffer = (0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)'

我没有任何额外的引号，那么为什么会发生这种情况呢？

在许多shell中（我相信tcsh是伯恩兼容的），您必须将表达式的左侧、

=

和右侧都直接相邻

# shorten the ` = ` to `=` below:
set buffer=(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)
set count=1

if ($#argv > 20) goto toomany
#
foreach argument ($argv[*])
set buffer[$count] = $argument
@ count++
end
# REPLACE command ON THE NEXT LINE WITH
# THE PROGRAM YOU WANT TO CALL.
exec command $buffer[*]
#
toomany:
echo "Too many arguments given."
echo "Usage: foreach_1 [up to 20 arguments]"
exit 1