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Sparse Matrix, Need help reading in sparse matrix

riskyricky	6 Dec, 2008 - 03:28 PM Post #1
New D.I.C Head Joined: 30 Sep, 2008 Posts: 6	I'm trying to read in a sparse matrix for a .txt file. The size of the matrix is 20 x 20 always. I need to read in the sparse matrix and store it into a regular matrix 20 x 20. I can open and read in data, but do not know how to reference the sparse into a regular matrix. sparse.txt file 20,20 0,2-8 0,7-3 1,2-1 2,18-7 3,16-2 5,12-9 5,15-12 8,7-3 9,3-6 10,0-19 10,12-5 13,17-3 14,3-18 15,12-3 Need to read in and convert to normal matrix. Any help greatly appreciated. Thanks CODE int read_sparse_matrix(int read_matrix[20][20], FILE* infile){ do{ printf("Enter the file name of First Matrix\n>>"); scanf("%s", &file); printf("Opening file %s...\n", file); if((infile = fopen(file, "r")) == NULL){ printf("Error Opening File. Try Agian\n\n"); } }while(infile == NULL); x = fgetc(infile); while(x != '\n'){ x = fgetc(infile); } x = fgetc(infile); for(i=0;i<20;i++){ for(j=0;j<20;j++){ if(x == ' ' \|\| x == '\n'){ x = fgetc(infile); } if(x != ' ' && x != '\n'){ A[i][j] = ((int)x)-48; //Assigns matrix A to data. } x = fgetc(infile); } } return 0; }
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