Hello there,

We are using a optimization tool called CPLEX and the inputs for this
program is fed from a text file which contains a matrix with rows and
colums (max rows and colums will be 100 X 100).

I know how to call a C program into this optimization tool.

 I want to know how to store this data in array [i][j] from the text
file, the delimiter used is comma ",".

The text file say network.txt looks something like this.

1,0,0,1,0
0,1,1,0,1
0,0,0,1,0
1,1,0,1,0

I need  this to be stored in array [i][j]. The program should strictly
be in C only.

Thanks.
Perry

p.s: Bonus will be given too

Perry1872,

This C program will do what you want. You can change the variable
declaration to expand the matrix beyond 100 elements. You cn also
change the filename from network.txt to whatever you need it to be.

NOTE: You may need to unwrap lines wrapped by the answer box.

// ------------- CODE BEGIN -------------

#include <stdio.h>

void	main()
{
int	n[100][100];
int	i;
int	j;
int	a;
int	di;
int	dj;
int	quit;
FILE	*fp;
char	line[1024];
char	*cp;

	i = 0;
	quit = 0;
	fp = fopen("network.txt", "r");
	if(fp != NULL)
	{
		while((fgets(line, 1024, fp)) && (quit == 0))
		{
			j = 0;
			cp = line;
			while((*cp != '\0') && (quit == 0))
			{
				a = atoi(cp);
				if((i < 100) && (j < 100))
				{
					n[i][j] = a;
					j++;
					while((*cp != ',') && (*cp != '\0')) cp++;
					if(*cp == ',') cp++;
				}
				else
				{
					quit = 1;
					fprintf(stderr, "Error: Rows or columns has exceeded 100. Exiting
program.\n");
				}
			}
			i++;
		}
		fclose(fp);
		
		// DEBUG loop to print out array contents
		if(quit == 0)
		{
			for(di = 0; di < i; di++)
			{
				printf("ROW %d : ", di);
				for(dj = 0; dj < j; dj++)
				{
					printf("%d	", n[di][dj]);
				}
				printf("\n");
			}
			
		}
	}
	else
	{
		fprintf(stderr, "Error: Unable to open network.txt.\n");
	}
}

// ------------- CODE END -------------



Good luck with CPLEX!

- Hammer


Search strategy
---------------
None. Wrote a C program per stated requirements.