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Lab5/Task2.c

+#include <stdio.h>
+#include <math.h>
+int main()
+{
+    int matrix[4][3] = {
+        {1, 4, 6},
+        {2, -3, 1},
+        {3, 5, 0},
+        {3, 1, -3}};
+    int j;
+    int n;
+    int q;
+    int p;
+    int dot;
+    int lenSq1;
+    int lenSq2;
+    double angle;
+    printf("vector1   vector2  angle in degree\n");
+    for (j = 0; j < 4; j = j + 2)
+    {
+        for (n = 0; n < 4; n++)
+        {
+            if (n != j)
+            {
+                int x1 = matrix[j][0];
+                int y1 = matrix[j][1];
+                int z1 = matrix[j][2];
+                int x2 = matrix[n][0];
+                int y2 = matrix[n][1];
+                int z2 = matrix[n][2];
+                dot = x1 * x2 + y1 * y2 + z1 * z2;
+                lenSq1 = x1 * x1 + y1 * y1 + z1 * z1;
+                lenSq2 = x2 * x2 + y2 * y2 + z2 * z2;
+                angle = acos(dot / sqrt(lenSq1 * lenSq2));
+
+                angle = angle * (180.0 / 3.14159265);
+
+                for (q = 0; q < 3; q++)
+                {
+                    printf("%d ", matrix[j][q]);
+                }
+                printf("    ");
+                for (p = 0; p < 3; p++)
+                {
+                    printf("%d ", matrix[n][p]);
+                }
+                printf("    ");
+                printf("%f\n", angle);
+            }
+        }
+    }
+
+    return 0;
+}