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37 lines
1021 B
Zig
37 lines
1021 B
Zig
//
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// Check this out:
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//
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// var foo: u8 = 5; // foo is 5
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// var bar: *u8 = &foo; // bar is a pointer
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//
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// What is a pointer? It's a reference to a value. In this example
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// bar is a reference to the memory space that currently contains the
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// value 5.
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//
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// A cheatsheet given the above declarations:
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//
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// u8 the type of a u8 value
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// foo the value 5
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// *u8 the type of a pointer to a u8 value
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// &foo a reference to foo
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// bar a pointer to the value at foo
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// bar.* the value 5 (the dereferenced value "at" bar)
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//
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// We'll see why pointers are useful in a moment. For now, see if you
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// can make this example work!
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//
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const std = @import("std");
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pub fn main() void {
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var num1: u8 = 5;
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const num1_pointer: *u8 = &num1;
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var num2: u8 = undefined;
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// Please make num2 equal 5 using num1_pointer!
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// (See the "cheatsheet" above for ideas.)
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num2 = ???;
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std.debug.print("num1: {}, num2: {}\n", .{ num1, num2 });
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}
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