Originally posted by: Rym

Hi

 

I would like to extract data from a text file. Suppose that i have .txt:

 

5

10

12

14

 

Suppose that i would  like to fill the array CPU with the data from the text

 

for (var i in CPU)

{

CPU[i]=  line by line from the text

}

In C language i did

int =4;

char cpus[n];

int cpu[n];

cur_posc=ic;
fseek(fichierc, cur_posc,0);

i=0;
while(i<n)
{
fgets(cpus,1000,fichierc);
cpu[i]=atoi(cpus);
cur_posc = ftell(fichierc);
i++;

}
 

 

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

suppose you have your data in f.txt

then in OPL

execute {
   var f = new IloOplInputFile("f.txt");
   if (f.exists) {
     writeln("the file output.txt exists");
     var s;
     while (!f.eof) {
      s=f.readline();
      writeln(s);
     }
     f.close();
   } else {
     writeln("the file output.txt doesn't exist");
   }
}

will give

the file output.txt exists
5

10

12

14

regards

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

It is ok for the extraction of file. But i want to generate for each "i", 1<i<=2; an array of 5 integers.

 

For example my  f.txt

 

1

2

3

4

5

6

7

8

9

10

for i=1

CPU=[1,2,3,4,5]

for i =2

CPU=[6,7,8,9,10]

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Then you could have a look at

IloOplOutputFile

regards

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: Rym

I can't find a notions of cursor  and fseek function like in C language.

#DecisionOptimization
#OPLusingCPLEXOptimizer

Hi

if you do not find what you need within opl 

and you feel c is easier for you

then you could use IloOplExec 

https://www.ibm.com/developerworks/community/forums/html/topic?id=4bef7847-9ac0-4402-bd3d-74eba89a03f8&ps=25

to call your c program from opl

regardd

#DecisionOptimization
#OPLusingCPLEXOptimizer