Сделал 45 Задание

45Ex/solve_polynomial.c

@@ -0,0 +1,20 @@
+#include "solve_polynomial.h"
+
+int solvePolynomial(FILE * file, double x, double * derivative, double * polynomial) {
+    double current, i;
+
+    if (fscanf(file, "%lf", &current) != 1) {
+        printf("File is empty!\n");
+        return 1;
+    }
+
+    *derivative = *polynomial = i = 0.;
+
+    do {
+        *polynomial += current * pow(x, i);
+        *derivative += i * current * pow(x, i - 1);
+        i++;
+    } while (fscanf(file, "%lf", &current) == 1);
+
+    return 0;
+}