add dep rand.

Cargo.lock

@@ -2,6 +2,139 @@
 # It is not intended for manual editing.
 version = 3
 
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+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "guessing_game"
 version = "0.1.0"
+dependencies = [
+ "rand",
+]
+
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+name = "libc"
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+ "zerocopy",
+]
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+
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+name = "rand"
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+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
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+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
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+]
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+ "quote",
+ "unicode-ident",
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+ "zerocopy-derive",
+]
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+[[package]]
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+rand = "0.8.5"

README.md

@@ -0,0 +1,5 @@
+# guessing_game
+
+```
+cargo add rand
+```