Added last three homeworks

2025.02.28/7Ex/solve.c

@@ -0,0 +1,25 @@
+#include "solve.h"
+
+void t7_solve(char **a, int n, int (*cmp)(const char *, const char *))
+{
+	int i;
+	for (i = 1; i < n; ++i)	append(a, i+1, a[i], find(a, i, a[i], cmp));
+}
+
+int find(char **a, int n, char *x, int (*cmp)(const char *, const char *)) {
+	int avg = (n + (-1)*(n%2)) / 2;
+	int comp;
+
+	if (n == 0) return 0;
+	
+	comp = cmp(x, a[avg]);
+	if (comp < 0) return find(a, avg, x, cmp);
+	if (comp > 0) return avg+1 + find(a+(avg+1), n-(avg+1), x, cmp);
+	else return avg;
+}
+
+void append(char **arr, int n, char *a, int index)
+{
+	for (int i = n-1; i > index; --i) arr[i] = arr[i-1];
+	arr[index] = a;
+}