Create Floyd.c

Author: techbless

Algorithm/Floyd.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define TRUE 1
+#define FALSE 0
+#define MAX_VERTICES 100
+#define INF 10000000
+
+typedef struct GraphType {
+    int n;
+    int weight[MAX_VERTICES][MAX_VERTICES];
+} GraphType;
+
+int A[MAX_VERTICES][MAX_VERTICES];
+
+void printA(GraphType* g) {
+    int i, j;
+    printf("==========================\n");
+    for (int i = 0; i < g->n; i++) {
+        for (int j = 0; j < g->n; j++) {
+            if (A[i][j] == INF) {
+                printf(" * ");
+            }
+            else {
+                printf("%3d", A[i][j]);
+            }
+        }
+        printf("\n");
+    }
+
+    printf("==========================\n");
+}
+
+void floyd(GraphType* g) {
+    for (int i = 0; i < g->n; i++) {
+        for (int j = 0; j < g->n; j++) {
+            A[i][j] = g->weight[i][j];
+        }
+    }
+
+    printA(g);
+
+    for (int k = 0; k < g->n; k++) {
+        for (int i = 0; i < g->n; i++) {
+            for (int j = 0; j < g->n; j++) {
+                if (A[i][k] + A[k][j] < A[i][j]) {
+                    A[i][j] = A[i][k] + A[k][j];
+                }
+            }
+        }
+
+        printA(g);
+    }
+}
+
+int main(void) {
+    GraphType g = { 7,
+    {
+        { 0, 7, INF , INF , 3, 10, INF },
+        { 7, 0, 4, 10, 2, 6, INF },
+        { INF , 4, 0, 2 , INF , INF , INF },
+        { INF , 10, 2, 0, 11, 9, 4 },
+        { 3, 2, INF , 11, 0, INF , 5 },
+        { 10, 6, INF , 9, INF , 0, INF },
+        { INF , INF , INF , 4, 5, INF , 0 }
+    }};
+    floyd(&g);
+
+    return 0;
+}