59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "array_io.h"
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io_status read_values (double * restrict X, double * restrict Y, const int n, const char * restrict name)
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{
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FILE *fp;
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if (!(fp = fopen(name, "r")))
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return ERROR_OPEN;
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for (int i = 0; i < n; ++i)
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if (fscanf(fp, "%lf\t%lf", X + i, Y + i) != 2)
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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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io_status read_values_and_derivatives (
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double * restrict X,
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double * restrict Y,
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double * restrict D,
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const int n,
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const char * restrict name
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)
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{
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FILE *fp;
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if (!(fp = fopen(name, "r")))
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return ERROR_OPEN;
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for (int i = 0; i < n; ++i)
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if (fscanf(fp, "%lf\t%lf\t%lf", X + i, Y + i, D + i) != 3)
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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_values (const double * restrict X, const double * restrict Y, const int n, const int p)
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{
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int np = (n > p ? p : n);
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for (int i = 0; i < np; i++)
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printf("f(%lf) = %lf\n", X[i], Y[i]);
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}
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void print_values_and_derivatives (
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const double * restrict X,
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const double * restrict Y,
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const double * restrict D,
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const int n, const int p
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)
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{
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int np = (n > p ? p : n);
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for (int i = 0; i < np; i++)
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printf("f(%lf) = %lf, f`(%lf) = %lf\n", X[i], Y[i], X[i], D[i]);
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}
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