如何用“匹配”重写` be‘链将整数与值进行比较？
如何用“匹配”重写` be‘链将整数与值进行比较？
提问于 2022-01-13 10:32:54
fn test_if_else(c: i32) {
if c > 0 {
println!("The number {} is greater than zero", c);
} else if c < 0 {
println!("The number {} is less then zero", c);
} else {
println!("the number {} is equal to zero", c);
}我的遭遇是这样的
match c {
0 => println!("the number {} is equal to zero", c),
0..infinity => println!("The number {} is greater than zero", c),
_ => println!("the number {} is equal to zero", c)
}但它不适用于“无穷大”
回答 2
Stack Overflow用户
回答已采纳
发布于 2022-01-13 12:21:33
您也可以使用if c>0保护来完成这一任务，这是比较灵活的。
fn test_if_else(c: i32) {
match c {
0 => println!("the number {} is equal to zero", c),
c if c > 0 => println!("The number {} is greater than zero", c),
_ => println!("the number {} is lesser than zero", c),
}
}Stack Overflow用户
发布于 2022-01-13 10:37:35
您只需要使用一个开放范围的0..
fn test_if_else(c: i32) {
match c {
0 => println!("the number {} is equal to zero", c),
0.. => println!("The number {} is greater than zero", c),
_ => println!("the number {} is lesser than zero", c),
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/70695102
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