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kood.c

+//Programmeerimine 2, kodutöö 2 , variant 21
+
+#include <stdio.h>
+#include <math.h>
+
+int sisestus1 (char []); // e
+int sisestus2 (char []);// x
+double calculate_A(int , double );
+void valjastus (FILE *, int , double []);
+
+
+int main() {
+	
+double A[15];
+double X = sisestus1 ("Sisesta reaalarvuline X : \n");
+double e = sisestus2 ("Sisesta reaalarvuline E : \n");
+int L = 1;
+A[0] = X;
+
+while (L < 15 && fabs(A[L-1] - A[L-2]) > e) {
+	A[L] = calculate_A(L+1, X);
+	L++;
+    }
+
+printf("A elementide arv: %d\n", L);
+    
+			FILE *fp; //faili avamine ja kontroll kas on see olemas
+			fp = fopen("F.txt", "w");
+			if (fp == NULL){
+			printf("File 'F1.txt' not found");
+			return 1;}
+
+valjastus(fp,L, A);
+
+	fclose(fp); // faili kinni panemine
+    return 0;
+}
+
+
+int sisestus1 (char text[]) // E sisestus
+{
+float nr;
+do {
+printf("%s", text);
+scanf ("%f", &nr);
+}
+while(nr<0 || nr>1);  // 0<e<1
+return nr;
+}
+
+
+int sisestus2 (char text[]) //X-i sisestus
+{
+float arv;
+do {
+printf("%s", text);
+scanf ("%f", &arv);
+}
+while(fabs(arv) > 0 ); //|x|<1
+return arv;
+}
+
+double calculate_A(int L, double X) { 
+    if (L == 1) {
+        return X;
+    }
+    double sum = 0;
+    for (int i = 1; i <= L-1; i++) {
+        sum += ((2*i-1) * calculate_A(i, X));
+    }
+    return -1.0 / L * pow(X, 2*L-3) * sum; 
+}
+
+
+
+void valjastus (FILE *fp, int L, double A[]){
+
+fprintf(fp, "A elemintide arv %d\n", L);
+for (int i = 0; i < L; i++) {
+	fprintf( fp,"A[%d] \t%lf\n", i+1, A[i]);
+	}}