72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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void readEdge (int *i, int *j)
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/* Scans input to read a blocked edge.
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Returns the indices i and j in m[13][13] of an edge.
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Call this function with pointers to the variables
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that should receive the values, e.g.
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readEdge (&x, &y);
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*/
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{
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int cx, cy;
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char d;
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scanf ("%d %d %c", &cy, &cx, &d);
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if (d == 's') {
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*i = 2 + cy * 2 + 1;
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*j = 2 + cx * 2;
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}
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else if (d == 'e') {
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*i = 2 + cy * 2;
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*j = 2 + cx * 2 + 1;
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}
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else {
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fprintf (stderr, "error on direction: %c\n", d);
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exit (1);
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}
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}
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void readStation (int *i, int *j)
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/* Scans input to read a station.
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Returns the indices i and j in m[13][13] of a station.
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*/
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{
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int s;
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scanf ("%d", &s);
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switch (s) {
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case 1: *i = 12, *j = 4; break;
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case 2: *i = 12, *j = 6; break;
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case 3: *i = 12, *j = 8; break;
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case 4: *i = 8, *j = 12; break;
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case 5: *i = 6, *j = 12; break;
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case 6: *i = 4, *j = 12; break;
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case 7: *i = 0, *j = 8; break;
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case 8: *i = 0, *j = 6; break;
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case 9: *i = 0, *j = 4; break;
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case 10: *i = 4, *j = 0; break;
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case 11: *i = 6, *j = 0; break;
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case 12: *i = 8, *j = 0; break;
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default: fprintf (stderr, "Illegal station\n"); exit (-1);
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}
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}
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void printCrossingName (int i, int j)
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/* Print the name of the crossing with indices i and j in m[13][13]/ */
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{
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if ((i-2)%2 == 0 && (j-2)%2 == 0)
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printf ("c%d%d ", (i-2)/2, (j-2)/2);
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}
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void printMatrix (int m[][13])
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/* Print the elements of the matrix m[13][13]. */
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{
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int i, j;
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for (i = 0; i < 13; i++) {
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for (j = 0; j < 13; j++) {
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printf ("%2d ", m[i][j]);
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}
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printf ("\n");
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}
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}
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