Question

您好，我这里有一段python程序，想把它改写为PHP程序，希望帮帮忙，非常感谢了

/ Dr. Han’s implementation of the BWT
// 20140408
$t = "tomorrow_and_tomorrow_and_tomorrow";
$bwt_t = bwt($t);
$tBack = reverseBwt($bwt_t);
print "t: $t\n";
print "bwt_t: $bwt_t\n";
print "t_back: $tBack\n";
print "Job done!\n";
function bwt($t){
……
}
function reverseBwt($bw){
……
}

结果：
‐bash‐3.2$ php bwt.php
t: tomorrow_and_tomorrow_and_tomorrow
bwt_t:
wwwdd__nnoooaatttmmmrrrrrrooo__$ooo
t_back:
$worromot_dna_worromot_dna_worromot
Job done!
‐bash‐3.2$
如果没错的话，您应该是国科大的学长，这是韩春生老师的作业，很为难

Answer 1

变量前面有$,语句结束必须有 ;

你给的明显是php程序吧？

改成python试试：

#Dr. Han’s implementation of the BWT
#20140408
def bwt(t):
    .... #楼主，你省略了php语句，让我怎么改？是一段加密算法？

def reverseBwt(bw):
    .... #楼主，你省略了php语句，让我怎么改？是一段解密算法？

t = "tomorrow_and_tomorrow_and_tomorrow"
bwt_t = bwt(t)
tBack = reverseBwt(bwt_t)

print "t: "+t+"\n"
print "bwt_t: "+ bwt_t +"\n"
print "t_back: "+tBack+"\n"
print "Job done!\n"