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Changed get_input() to return Option<u32>

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This commit is contained in:
lmstolton
2023-09-04 19:29:18 +01:00
parent 1ebccd65a4
commit 7dff2a67e7
1 changed files with 30 additions and 34 deletions
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64
43_Hammurabi/rust/src/main.rs
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@@ -46,28 +46,27 @@ fn run() {
loop {
println!("HOW MANY ACRES DO YOU WISH TO BUY? ");
if let Some(qty) = get_input() {
if qty < 0 { // A negative amount is impossible
impossible_task();
game_failed = true;
break 'main;
}
// Player decides not to buy any land
if qty == 0 {
bought_land = false;
break;
}
// Trying to buy more land than you can afford?
if land_price * qty as u32 > grain {
if land_price * qty > grain {
insufficient_grain(grain);
continue;
}
// Everything checks out OK
if land_price * qty as u32 <= grain {
acres += qty as u32;
grain -= land_price * qty as u32;
if land_price * qty <= grain {
acres += qty ;
grain -= land_price * qty ;
bought_land = true;
break;
}
} else {
impossible_task();
game_failed = true;
break 'main;
}
}
@@ -75,19 +74,18 @@ fn run() {
loop {
println!("HOW MANY ACRES DO YOU WISH TO SELL? ");
if let Some(qty) = get_input() {
if qty < 0 { // A negative amount is impossible
impossible_task();
game_failed = true;
break 'main;
}
// Everything checks out OK
if qty as u32 <= acres {
acres -= qty as u32;
grain += land_price * qty as u32;
if qty <= acres {
acres -= qty;
grain += land_price * qty;
break;
}
// Trying to sell more land that you own
insufficient_land(acres);
} else {
impossible_task();
game_failed = true;
break 'main;
}
}
}
@@ -95,50 +93,48 @@ fn run() {
loop {
println!("HOW MANY BUSHELS DO YOU WISH TO FEED YOUR PEOPLE? ");
if let Some(qty) = get_input() {
if qty < 0 { // A negative amount is impossible
impossible_task();
game_failed = true;
break 'main;
}
// Trying to use more grain than is in silos?
if qty as u32 > grain {
if qty > grain {
insufficient_grain(grain);
continue;
}
// Everything checks out OK
bushels_fed = qty as u32;
bushels_fed = qty;
grain -= bushels_fed;
break;
} else {
impossible_task();
game_failed = true;
break 'main;
}
}
loop {
println!("HOW MANY ACRES DO YOU WISH TO PLANT WITH SEED? ");
if let Some(qty) = get_input() {
if qty < 0 { // A negative amount is impossible
impossible_task();
game_failed = true;
break 'main;
}
// Trying to plant more acres than you own?
if qty as u32 > acres {
if qty > acres {
insufficient_land(acres);
continue;
}
// Enough grain for seed?
if qty as u32 / 2 > grain {
if qty / 2 > grain {
insufficient_grain(grain);
continue;
}
// Enough people to tend the crops?
if qty as u32 > (10 * population) {
if qty > (10 * population) {
insufficient_people(population);
continue;
}
// Everything checks out OK
planted = qty as u32;
planted = qty;
grain -= planted / 2;
break;
} else {
impossible_task();
game_failed = true;
break 'main;
}
}
@@ -217,7 +213,7 @@ fn run() {
println!("\nSO LONG FOR NOW.\n");
}
fn get_input() -> Option<i32> {
fn get_input() -> Option<u32> {
let mut input = String::new();
io::stdin().read_line(&mut input).expect("Failed read_line");
match input.trim().parse() {