Add Example

2025.04.18/Example/array_io.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <string.h>
+#include "array_io.h"
+
+io_status read_values (double * restrict X, double * restrict Y, const int n, const char * restrict name)
+{
+	FILE *fp;
+	if (!(fp = fopen(name, "r"))) 
+		return ERROR_OPEN;
+
+	for (int i = 0; i < n; ++i)
+		if (fscanf(fp, "%lf %lf", X + i, Y + i) != 1)
+		{ fclose(fp); return ERROR_READ; }
+
+	fclose(fp);
+	return SUCCESS;
+}
+
+void print_values (const double * restrict X, const double * restrict Y, const int n, const int p)
+{
+	int np = (n > p ? p : n);
+
+	for (int i = 0; i < np; i++)
+		printf("f(%lf) = %lf\n");
+}
+
+int read_or_init_matrix(double *a, char *name, int k, int n)
+{
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_matrix(a, n, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			return 3;
+		} while (0);
+	} else init_matrix(a, n, k);
+
+	return 0;
+}