HP Pascal/iX Reference Manual (31502-90022)

9- 9
strread
Usage
strread (s, p, t, v)
strread (s, p, t, v1,...,vn)
Parameters
s A string expression.
p An integer expression.
t An integer or integer subrange variable.
v A simple, string, or PAC variable. Any number of v parameters
may appear separated by commas.
Description
The procedure strread (s, p, t, v) reads a value from s , starting at s [ p
] , into the variable v . After the operation, the value of the variable
appearing as the t parameter will be the index of s immediately after the
index of the last component read into v .
S is treated as a single-line textfile. Strread (s, p, t, v) is analogous
to read (f, v) when f is a textfile of one line. Like read, strread
implicitly converts a sequence of characters from s into the types
integer, real, longreal, Boolean, enumerated, PAC, or string.
It is an error if strread attempts to read beyond the current length of
s .
The call:
strread (s,p,t,v1,...,vn);
is equivalent to:
strread (s,p,t,v1);
strread (s,t,t,v2);
.
.
strread (s,t,t,vn);
Example
VAR
s: string[80];
p,t: 1..80;
m,n: integer;
BEGIN
.
s:= ' 12 564 ';
.
p:= 1;
strread(s,p,t,m); { The value of m will be 12; }
. { t will be 6. }
.
strread(s,t,t,n); { The value of n will be 564; }
. { t will be 11. }
END.