>>825
C：f= open(out, O_WRONLY|O_CREAT|O_TRUNC, 0777);
D：auto to = File("output.txt", "wb");
Erlang：{ok, Contents} = file:read_file( "input.txt" ),
Fortran(2003)：open(in, file="input.txt", status="old", action="read", access="stream", iostat=err)
Basic(Free Basic/VB)：Open "input.txt" For Input As #1
Nim：var f = open "output.txt", fmWrite
Objective-C：NSData *data = [NSData dataWithContentsOfFile:@"input.txt"];
Perl：open my $fh_in, '<', 'input.txt' or die "$!";
Python：infile = open('input.txt', 'r')
Tcl：set infile [open "input.txt" r]

Rustは異質、ド変態はFortranとObjective-C。Swiftは知らん