The Second and Third Tasks are done

2025.03.07/2Ex/solve.c

@@ -0,0 +1,11 @@
+#include "solve.h"
+#include "math.h"
+
+double t2_solve(double *a, int n)
+{
+	double trace = 0;
+	int i;
+	for (i = 0; i < n; i++)
+		trace += a[i * n + i];
+	return trace;
+}