exp 1-6: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

4.c

@@ -0,0 +1,33 @@
+#include <stdio.h>
+
+int main() {
+  double xp, yp = 0, p;
+  int i, j, n;
+
+  printf("Number of inputs: ");
+  scanf("%d", &n);
+
+  double x[n], y[n];
+  printf("Input sample space:\n");
+
+  for (i = 0; i < n; i++) {
+    printf("x%d: ", i);
+    scanf("%lf", x + i);
+    printf("y%d: ", i);
+    scanf("%lf", y + i);
+  }
+
+  printf("Enter interpolation point x: ");
+  scanf("%lf", &xp);
+
+  for (i = 0; i < n; i++) {
+    p = 1;
+    for (j = 0; j < n; j++) {
+      if (i != j) {
+        p *= (xp - x[j]) / (x[i] - x[j]);
+      }
+    }
+    yp += p * y[i];
+  }
+  printf("Interpolated value for %lf is %lf.", xp, yp);
+}