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5.1.42 fprintf
Procedure from library standard.lib (see standard_lib).
- Syntax:
fprintf ( link_expression, string_expression [,
any_expressions] )
- Return:
- none
- Purpose:
fprintf(l,fmt,...); performs output formatting.
The second argument is a format control string. Additional
arguments may be required, depending on the content of the
control string. A series of output characters is generated as
directed by the control string; these characters are
written to the link l.
The control string fmt is simply text to be copied, except
that the string may contain conversion specifications.
Type help print; for a listing of valid conversion
specifications. As an addition to the conversions of print,
the %n and %2 conversion specification does not
consume an additional argument, but simply generates a newline
character.
- Note:
- If one of the additional arguments is a list, then it should be
enclosed once more into a
list() command, since passing
a list as an argument flattens the list by one level.
Example:
| | ring r=0,(x,y,z),dp;
module m=[1,y],[0,x+z];
intmat M=betti(mres(m,0));
list l=r,m,M;
link li=""; // link to stdout
fprintf(li,"s:%s,l:%l",1,2);
==> s:1,l:int(2)
fprintf(li,"s:%s",l);
==> s:(0),(x,y,z),(dp(3),C)
fprintf(li,"s:%s",list(l));
==> s:(0),(x,y,z),(dp(3),C),y*gen(2)+gen(1),x*gen(2)+z*gen(2),1,1
fprintf(li,"2l:%2l",list(l));
==> 2l:list("(0),(x,y,z),(dp(3),C)",
==> module(y*gen(2)+gen(1),
==> x*gen(2)+z*gen(2)),
==> intmat(intvec(1,1 ),1,2))
==>
fprintf(li,"%p",list(l));
==> [1]:
==> // characteristic : 0
==> // number of vars : 3
==> // block 1 : ordering dp
==> // : names x y z
==> // block 2 : ordering C
==> [2]:
==> _[1]=y*gen(2)+gen(1)
==> _[2]=x*gen(2)+z*gen(2)
==> [3]:
==> 1,1
fprintf(li,"%;",list(l));
==> [1]:
==> // characteristic : 0
==> // number of vars : 3
==> // block 1 : ordering dp
==> // : names x y z
==> // block 2 : ordering C
==> [2]:
==> _[1]=y*gen(2)+gen(1)
==> _[2]=x*gen(2)+z*gen(2)
==> [3]:
==> 1,1
==>
fprintf(li,"%b",M);
==> 0 1
==> ------------------
==> 0: 1 1
==> ------------------
==> total: 1 1
==>
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See also:
print;
printf;
sprintf;
string.
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