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楼主是这个意思不?
$ cat file1
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
char x[ ]
ICESUMMIT@ICESUMMI ~
$ awk '{printf("%s %s%d%s\n", $1,$2,NR-1,"]")}' file1
char x[0]
char x[1]
char x[2]
char x[3]
char x[4]
char x[5]
char x[6]
char x[7]
char x[8]
char x[9]
char x[10]
char x[11]
char x[12]
char x[13]
char x[14]
char x[15]
char x[16]
char x[17]
char x[18]
char x[19] |
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