add ex081 anon structs 2

This commit is contained in:
Dave Gauer 2021-05-09 14:25:51 -04:00
parent ae0dc2b282
commit c0bbbee176
3 changed files with 59 additions and 0 deletions

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@ -400,6 +400,10 @@ const exercises = [_]Exercise{
.main_file = "080_anonymous_structs.zig",
.output = "[Circle(i32): 25,70,15] [Circle(f32): 25.2,71.0,15.7]",
},
.{
.main_file = "081_anonymous_structs2.zig",
.output = "x:205 y:187 radius:12",
},
};
/// Check the zig version to make sure it can compile the examples properly.

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@ -0,0 +1,47 @@
//
// An anonymous struct value LITERAL (not to be confused with a
// struct TYPE) uses '.{}' syntax:
//
// .{
// .center_x = 15,
// .center_y = 12,
// .radius = 6,
// }
//
// These literals are always evaluated entirely at compile-time.
// The example above could be coerced into the i32 variant of the
// "circle struct" from the last exercise.
//
// Or you can let them remain entirely anonymous as in this
// example:
//
// fn bar(foo: anytype) void {
// print("a:{} b:{}\n", .{foo.a, foo.b});
// }
//
// bar(.{
// .a = true,
// .b = false,
// });
//
// The example above prints "a:true b:false".
//
const print = @import("std").debug.print;
pub fn main() void {
printCircle(.{
.center_x = @as(u32, 205),
.center_y = @as(u32, 187),
.radius = @as(u32, 12),
});
}
// Please complete this function which prints an anonymous struct
// representing a circle.
fn printCircle(???) void {
print("x:{} y:{} radius:{}\n", .{
circle.center_x,
circle.centaur_y,
circle.radius,
});
}

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@ -0,0 +1,8 @@
41c41
< fn printCircle(???) void {
---
> fn printCircle(circle: anytype) void {
44c44
< circle.centaur_y,
---
> circle.center_y,