40 lines
841 B
C
40 lines
841 B
C
#include <stdio.h>
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#include "array_io.h"
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io_status read_matrix(double *a, int m, int n, const char *name)
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{
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int i, j;
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FILE *fp;
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if (!(fp = fopen(name, "r"))) return ERROR_OPEN;
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for (i = 0; i < m; i++)
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for (j = 0; j < n; j++)
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if (fscanf(fp, "%lf", a + i * n + j) != 1)
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{fclose(fp); return ERROR_READ;}
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fclose(fp);
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return SUCCESS;
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}
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void print_matrix(const double *a, int m, int n, int p)
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{
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int mp = (m > p ? p : m);
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int np = (n > p ? p : n);
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int i, j;
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for (i = 0; i < mp; i++)
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{
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for (j = 0; j < np; j++)
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printf(" %10.3e", a[i * n + j]);
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printf("\n");
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}
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}
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void init_matrix(double *a, int m, int n, int k)
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{
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double (*q)(int, int, int, int);
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double (*f[])(int, int, int, int) = {f1, f2, f3, f4};
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int i, j;
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q = f[k-1];
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for (i = 0; i < m; i++)
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for (j = 0; j < n; j++)
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a[i * n + j] = q(m, n, i+1, j+1);
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}
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