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5.1.140 sprintf
Procedure from library standard.lib (see standard_lib).
- Syntax:
sprintf ( string_expression [, any_expressions
] )
- Return:
- string
- Purpose:
sprintf(fmt,...); performs output formatting. The first
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 returned as a string.
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
wrapped in an additional
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;
string s = sprintf("s:%s,%n l:%l", 1, 2); s;
==> s:1,
==> l:int(2)
s = sprintf("s:%n%s", l); s;
==> s:
==> (0),(x,y,z),(dp(3),C)
s = sprintf("s:%2%s", list(l)); s;
==> s:
==> (0),(x,y,z),(dp(3),C),y*gen(2)+gen(1),x*gen(2)+z*gen(2),1,1
s = sprintf("2l:%n%2l", list(l)); s;
==> 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))
==>
s = sprintf("%p", list(l)); s;
==> [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
s = sprintf("%;", list(l)); s;
==> [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
==>
s = sprintf("%b", M); s;
==> 0 1
==> ------------------
==> 0: 1 1
==> ------------------
==> total: 1 1
==>
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See also:
fprintf;
print;
printf;
string.
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