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ül3

+#include <stdio.h>
+#include <stdio.h>
+
+int main(void)
+{
+    float x, sum, d;
+    int i;
+    printf("Sisesta arv: ");
+    scanf("%f", &x);
+    sum = 0;
+    d = x;
+    for (i = 1; i <= 21; d = (d * x / i++))
+    {
+        if ((i % 2) == 1)
+        {
+            sum = sum + d;
+            d = -d;
+        }
+    }
+    printf("%0.3f ", sum);
+    return 0;
+}