Added projects

Author: hitesh-bhatnagar

projects/Calc_cli/Cargo.lock

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+[package]
+name = "Calc_cli"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

projects/Calc_cli/Cargo.toml

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+use std::env;	// gives all cli args
+
+fn help(){
+	println!("Usage: Calc_cli <number1> <operator> <number2> ");
+	println!("Examples : Calc_cli 5 + 3");
+	println!("supported operators: + - * / % ^");
+}
+fn main() {
+
+	let args: Vec<String> = env::args().collect();
+
+	if args.len() != 4 {
+		help();
+		return;
+	}
+
+	let left_txt = &args[1];
+	let operator = &args[2];
+	let right_txt = &args[3];
+
+	// parse::<f64>() converts txt to floating pt number
+	let left = match left_txt.parse::<f64>() {
+		Ok(value) => value,
+		Err(_) => {
+			eprintln!("Error: '{}' is not a valid number.", left_txt);
+			return;
+		}
+	};
+
+	let right = match right_txt.parse::<f64>(){
+		Ok(value) => value,
+		Err(_) =>{
+			eprintln!("Error: '{}' is not a valid number.", right_txt);
+			return;
+		}
+	};
+
+    let result = match operator.as_str() {
+        "+" => Ok(left + right),
+        "-" => Ok(left - right),
+        "*" => Ok(left * right),
+        "/" => {
+            if right == 0.0 {
+                Err("division by zero")
+            } else {
+                Ok(left / right)
+            }
+        }
+        "%" => {
+            if right == 0.0 {
+                Err("modulo by zero")
+            } else {
+                Ok(left % right)
+            }
+        }
+        "^" => Ok(left.powf(right)),
+        _ => Err("unknown operator"),
+    };
+
+	match result {
+		Ok(value) => println!("Result: {}", value),
+		Err("division by zero") => eprintln!("Error: division by zero."),
+		Err("modulo by zero") => eprintln!("Error: modulo by zero"),
+		Err("unknown operator") => {
+			eprintln!("Error: unknown operator '{}'", operator);
+			help();
+		}
+
+		Err(other) => eprintln!("Error: {}", other),
+	}
+}

projects/Calc_cli/src/main.rs

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+{"rustc_fingerprint":12530310647617139397,"outputs":{"17747080675513052775":{"success":true,"status":"","code":0,"stdout":"rustc 1.94.1 (e408947bf 2026-03-25)\nbinary: rustc\ncommit-hash: e408947bfd200af42db322daf0fadfe7e26d3bd1\ncommit-date: 2026-03-25\nhost: x86_64-unknown-linux-gnu\nrelease: 1.94.1\nLLVM version: 21.1.8\n","stderr":""},"7971740275564407648":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/hitesh/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""},"11857020428658561806":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/hitesh/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""}},"successes":{}}

projects/Calc_cli/target/.rustc_info.json

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+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by cargo.
+# For information about cache directory tags see https://bford.info/cachedir/

projects/Calc_cli/target/CACHEDIR.TAG

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+This file has an mtime of when this was started.

projects/Calc_cli/target/debug/.cargo-lock

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+8878bce893697fc7

projects/Calc_cli/target/debug/.fingerprint/Calc_cli-0947da7c3fc223f1/dep-test-bin-Calc_cli

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+{"rustc":5391851738765093524,"features":"[]","declared_features":"[]","target":16068974997021304934,"profile":3316208278650011218,"path":4942398508502643691,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/Calc_cli-0947da7c3fc223f1/dep-test-bin-Calc_cli","checksum":false}}],"rustflags":[],"config":8247474407144887393,"compile_kind":0}