Read a fixed-format line from a data file.

Number of data items read.

The following opens a data file for reading, reads a line with text and a double value, separated by a semi-colon, and then reads a line with two integers and a string of up to ten characters marked by single quotes, all separated by blanks, before finally closing the file.

double value;
FILE *datafile;
char name[100];
int i[2];
   ...
datafile=fopen("filename", "r");
XPRBreadlinecb(XPRB_FGETS, datafile, 99, "T;g", name, &value);
XPRBreadlinecb(XPRB_FGETS, datafile, 50, "i i s[10]", &i[0],
               &i[1], name);
fclose(datafile);

This function reads input data files in a format compatible with the diskdata command of mp-model and Mosel. Data lines in the input file may be continued over several lines by using the line continuation sign &. The input file may also contain comments (preceded by !) and empty lines, both of which are skipped over. The data file is accessed with standard C functions ( fopen, fclose). The format string gives the type of data item to be read. Each string type may (optionally) be followed by the maximum length to be read. Otherwise, the maximum length is assumed to be length. The type of separator signs ( e.g. , ; :) used in the data file needs to be indicated between each pair of format options. As with the C functions printf or scanf, the format string is followed by the addresses where the data are stored. With function XPRBsetdecsign the decimal sign used in the data input may be changed, for instance to use a decimal comma.

XPRBreadarrlinecb, XPRBsetdecsign.