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/*
* Matrix Market I/O example program
*
* Create a small sparse, coordinate matrix and print it out
* in Matrix Market (v. 2.0) format to standard output.
*
* (See http://math.nist.gov/MatrixMarket for details.)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "mmio.h"
#define nz 4
#define M 10
#define N 10
int main()
{
MM_typecode matcode;
int I[nz] = { 0, 4, 2, 8 };
int J[nz] = { 3, 8, 7, 5 };
double val[nz] = {1.1, 2.2, 3.2, 4.4};
int i;
mm_initialize_typecode(&matcode);
mm_set_matrix(&matcode);
mm_set_coordinate(&matcode);
mm_set_real(&matcode);
mm_write_banner(stdout, matcode);
mm_write_mtx_crd_size(stdout, M, N, nz);
/* NOTE: matrix market files use 1-based indices, i.e. first element
of a vector has index 1, not 0. */
for (i=0; i<nz; i++)
fprintf(stdout, "%d %d %10.3g\n", I[i]+1, J[i]+1, val[i]);
return 0;
}