Re: How can I concatenate a string, a char array and an int

[Andrea Fontana via Digitalmars-d-learn]

On Tuesday, 29 November 2016 at 15:01:37 UTC, Anders S wrote:

Thanks guys for a really quick answer !!
OK, a little bit awkward to use but getting there
posting a new question about char * to struct ;)

Thanks
/anders


Also:

import std.conv : text;
string temp = "This is a number";
string greeting5 = text(temp, " ", 314356);

Andrea

Re: How can I concatenate a string, a char array and an int

[Anders S via Digitalmars-d-learn]

Thanks guys for a really quick answer !!
OK, a little bit awkward to use but getting there
posting a new question about char * to struct ;)

Thanks
/anders

Re: How can I concatenate a string, a char array and an int

[Nicholas Wilson via Digitalmars-d-learn]

On Tuesday, 29 November 2016 at 10:21:24 UTC, Anders S wrote:

Hi guys,

just started to get into Dlang, comming from C and C++ I like 
to use methods like there if possible.


Now I want to catenate something like this, but don't get it to 
work

in standard C i code:
   char str[80];
   sprintf(str, "This is a number = %f", 3.14356);

Now in Dlang and import core.stdc.string and
code:
char [80] str;
sprintf(str, "This is a number = %d", 314356);
writefln("%s", str);



sprintf(str.ptr, "This is a number = %d".toStringz,314356);


but get error
Error: function core.stdc.stdio.sprintf (char* s, const(char*) 
format, ...) is not callable using argument types (char[80], 
string, int)




because in D arrays do not decay to pointers. To get a null 
terminated string use toStringz



Nor does this work
   char [50] temp = "This is a number";
   string greeting5= temp~" "~314356;
   writefln("%s",greeting5);



add a to!string

314356.to!string


result in error:
Error: incompatible types for ((cast(const(char)[])temp ~ " ") 
~ (314356)): 'char[]' and 'int'



Any ideas or hints?
/anders

Re: How can I concatenate a string, a char array and an int

[rumbu via Digitalmars-d-learn]

On Tuesday, 29 November 2016 at 10:21:24 UTC, Anders S wrote:

Hi guys,

just started to get into Dlang, comming from C and C++ I like 
to use methods like there if possible.


Now I want to catenate something like this, but don't get it to 
work

in standard C i code:
   char str[80];
   sprintf(str, "This is a number = %f", 3.14356);


import std.format;
string str = format("This is a number = %f", 3.14356);



Now in Dlang and import core.stdc.string and
code:
char [80] str;
sprintf(str, "This is a number = %d", 314356);
writefln("%s", str);




but get error
Error: function core.stdc.stdio.sprintf (char* s, const(char*) 
format, ...) is not callable using argument types (char[80], 
string, int)


Nor does this work
   char [50] temp = "This is a number";
   string greeting5= temp~" "~314356;
   writefln("%s",greeting5);


import std.conv;
string temp = "This is a number";
string greeting5 = temp ~ " " ~ to!string(314356);




result in error:
Error: incompatible types for ((cast(const(char)[])temp ~ " ") 
~ (314356)): 'char[]' and 'int'



Any ideas or hints?
/anders

How can I concatenate a string, a char array and an int

[Anders S via Digitalmars-d-learn]

Hi guys,

just started to get into Dlang, comming from C and C++ I like to 
use methods like there if possible.


Now I want to catenate something like this, but don't get it to 
work

in standard C i code:
   char str[80];
   sprintf(str, "This is a number = %f", 3.14356);

Now in Dlang and import core.stdc.string and
code:
char [80] str;
sprintf(str, "This is a number = %d", 314356);
writefln("%s", str);

but get error
Error: function core.stdc.stdio.sprintf (char* s, const(char*) 
format, ...) is not callable using argument types (char[80], 
string, int)


Nor does this work
   char [50] temp = "This is a number";
   string greeting5= temp~" "~314356;
   writefln("%s",greeting5);

result in error:
Error: incompatible types for ((cast(const(char)[])temp ~ " ") ~ 
(314356)): 'char[]' and 'int'



Any ideas or hints?
/anders