Dear monks, Thank you all! My codes would run under unix command line. For example, the following segments say "HELLO WOULD!". #!/usr/bin/perl &run; exit(0); sub run { system("gcc code.cpp"); system("a.out/>result.txt"); open(F,"result.txt"); while(<F>) { print $_,"\n"; } close(F); } ##################################### But the system call never respondes to online inputs. I would like you monks to focus on this call. To Roy, "a.out/" is good for my machine. littlefishr

In reply to How to use system command in perl script? by littlefishr

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