From ecc350ca5c2eb50be8309c5f14f8bf0d87db9a02 Mon Sep 17 00:00:00 2001 From: Moon Flower Date: Mon, 12 Oct 2026 08:46:23 +0330 Subject: a --- examples/cli2.zc | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 examples/cli2.zc (limited to 'examples/cli2.zc') diff --git a/examples/cli2.zc b/examples/cli2.zc new file mode 100644 index 0000000..0c3de12 --- /dev/null +++ b/examples/cli2.zc @@ -0,0 +1,29 @@ +// the command line, the environment, and capturing what a program writes. +// run it as: ./bin/zy examples/cli2.zc one two (the first is this file's path +// when zy is given one, otherwise , exactly as argv[0] is in c) +include "src/lib/std.zc"; + +fn main() { + put_s("argv: "); + for (int i = 0; i < argc; i++) { put_s(argv[i]); if (i + 1 < argc) put_s(" "); } + put_c(10); + + // envp holds NAME=value strings, so a program can walk all of them + let n = 0; + for (int i = 0; i < envc; i++) if (Text.starts(envp[i], "HOME=")) n = n + 1; + put_s("HOME is set: "); put_n(n > 0); put_c(10); + + // the same name the old way, one lookup instead of a walk + let v[80]; + put_n(Host.env("HOME", v, 80) > 0); put_c(10); + + // capture what the program writes, instead of printing it. every put_c, + // put_s and put_n from here on lands in the buffer. + let buf = capture.start(); + put_s("this goes into the buffer, not the terminal"); + put_c(10); + buf.end(); // stops the capture and terminates the string + put_s("captured "); put_n(len_w(buf)); put_s(" characters: "); + put_s(buf); + return 0; +} \ No newline at end of file -- cgit v1.2.3