我无法使用MARS读取或写入文件-MIPS

时间:2019-10-06 15:43:30

标签: file io mips mars-simulator

我尝试使用以下代码来打开要写入的新文件,然后从内存缓冲区向其中写入文本,然后将其关闭。我相信txt文件应在自动保存MARS脚本的目录中创建,但是没有文件。 $ v0不是负数,因此我认为没有发生错误。有谁知道可能是什么问题?

        .data
fout:   .asciiz "testout.txt"      # filename for output
buffer: .asciiz "The quick brown fox jumps over the lazy dog."
        .text
  ###############################################################
  # Open (for writing) a file that does not exist
  li   $v0, 13       # system call for open file
  la   $a0, fout     # output file name
  li   $a1, 1        # Open for writing (flags are 0: read, 1: write)
  li   $a2, 0        # mode is ignored
  syscall            # open a file (file descriptor returned in $v0)
  move $s6, $v0      # save the file descriptor 
  ###############################################################
  # Write to file just opened
  li   $v0, 15       # system call for write to file
  move $a0, $s6      # file descriptor 
  la   $a1, buffer   # address of buffer from which to write
  li   $a2, 44       # hardcoded buffer length
  syscall            # write to file
  ###############################################################
  # Close the file 
  li   $v0, 16       # system call for close file
  move $a0, $s6      # file descriptor to close
  syscall            # close file
  ###############################################################

1 个答案:

答案 0 :(得分:0)

问题的原因在路径:fout: .asciiz "testout.txt"中。它必须是带有双\\而不是\的完整路径:

fout:.asciiz "C:\\Users\\Angry\\Desktop\\testout.txt"