home-coder
diff --git a/‎002-roulette.c
Lines changed: 95 additions & 0 deletions b/‎002-roulette.c
Lines changed: 95 additions & 0 deletions
@@ -1,8 +1,103 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+typedef struct _roulette {
+	char data;
+	struct _roulette *next;
+}roulette;
+
+static void roulette_init(roulette **rte, int people)
+{
+	int i = 0;
+	roulette *rtep = *rte;
+
+	if (rtep != NULL) {
+		printf("roulette already exsit\n");
+		return ;
+	}
+
+	while (i < people) {
+		roulette *nrte = (roulette *)malloc(sizeof(roulette));
+		if (!nrte) {
+			printf("nrte malloc failed\n");
+			return ;
+		}
+		nrte->data = 'a' + i++;
+
+		if (!rtep) {
+			rtep = nrte;
+			rtep->next = rtep;
+			*rte = rtep;
+		} else {
+			nrte->next = rtep->next;
+			rtep->next = nrte;	
+			rtep = nrte;
+		}
+	}
+
+}
+
+static void roulette_show(roulette *rte)
+{
+	roulette *rtep = rte;
+	if (!rtep) {
+		printf("roulette is not exsit\n");
+		return ;
+	}
+
+	do {
+		printf("%c->", rtep->data);
+		rtep = rtep->next;
+	} while(rtep != rte);
+
+	printf("\n");
+}
+
+static roulette *roulette_play(roulette *rte)
+{
+	int cham, trig;
+	roulette *rtep = rte;
+	if (!rtep) {
+		printf("roulette is not exist\n");
+		return ;
+	}
+
+	//首先找到首元节点的前趋节点作为计数起始点的前趋
+	while (rtep->next != rte) {
+		rtep = rtep->next;
+	}
+
+	do {
+		printf("please input chamber number & trigger number: ");
+		scanf("%d %d", &cham, &trig);	
+		for (; i < hit; i++) {
+				
+		}
+	} while();
+
+	return rtep;
+}
+
 int main(int argc, char **argv)
 {
+	roulette *rte = NULL, *last;
+	int people;
+
+	if (argc < 2) {
+		fprintf(stderr, "please read usage ./a.out 24\n");
+		exit(-1);
+	}
+
+	people = atoi(argv[1]);
+	printf("people %d\n", people);
+
+	roulette_init(&rte, people);
+	roulette_show(rte);
+
+	last = roulette_play(rte);
+	if (last) {
+		printf("last->data %c\n", last->data);
+	}
 
 	return 0;
 }