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September 03, 2019 How stdin.readf ignore space char? | ||||
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Hi guys: input is two line, first line is a number n and second line is n float point number, e.g. 3 1.1 2.2 3.3 how use stdin.readf get all number. i code below but not work well. int n; stdin.readf!"%d\n"(n); writeln("read n:",n); foreach (i; 0..n) { double x; stdin.readf!"%f"(x); //only return first number, why? writeln(x); } |
September 03, 2019 Re: How stdin.readf ignore space char? | ||||
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Posted in reply to lili | On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote: > Hi guys: > > input is two line, first line is a number n and second line is n float point number, > e.g. 3 > 1.1 2.2 3.3 > how use stdin.readf get all number. https://dlang.org/library/std/stdio/readf.html see example |
September 03, 2019 Re: How stdin.readf ignore space char? | ||||
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Posted in reply to a11e99z | On Tuesday, 3 September 2019 at 13:21:16 UTC, a11e99z wrote:
> On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote:
>> Hi guys:
>>
>> input is two line, first line is a number n and second line is n float point number,
>> e.g. 3
>> 1.1 2.2 3.3
>> how use stdin.readf get all number.
>
> https://dlang.org/library/std/stdio/readf.html
> see example
string d = "3.4 3.3 ";
double a;
double b;
//formattedRead(d,"%f %f", &a, &b);
d.readf!" %s %s"(a,b);//hug
writeln(a,b);
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September 03, 2019 Re: How stdin.readf ignore space char? | ||||
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Posted in reply to lili | On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote: > Hi guys: > > input is two line, first line is a number n and second line is n float point number, > e.g. 3 > 1.1 2.2 3.3 > how use stdin.readf get all number. u can read array this way too > auto darr = readln.split.map!(x => x.to!double).array; > darr.writeln; |
September 03, 2019 Re: How stdin.readf ignore space char? | ||||
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Posted in reply to lili | On Tuesday, 3 September 2019 at 13:25:30 UTC, lili wrote: > On Tuesday, 3 September 2019 at 13:21:16 UTC, a11e99z wrote: >> On Tuesday, 3 September 2019 at 12:55:29 UTC, lili wrote: > > string d = "3.4 3.3 "; > double a; > double b; > > //formattedRead(d,"%f %f", &a, &b); > > d.readf!" %s %s"(a,b);//hug > writeln(a,b); and this too > string ds = "1.1 2.2 3.3"; > double[] darr; > ds.formattedRead!"%( %s%)"( darr ); > darr.writeln; |
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