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Data-Structure-And-Algorithm-C-严蔚敏/ch3-stackqueue/Queue.c

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+#include<stdio.h>
+#include<conio.h>
+#include<stdlib.h>
+int index=0;
+int n=5;
+int q[100];
+void enqueue(int k)
+{
+	if(index<n)
+	{
+		q[index]=k;
+		index++;
+	}
+	else
+	{
+		printf("Queue is FULL!!\n");
+	}
+}
+void dequeue()
+{
+	if(index==0)
+	{
+		printf("Queue is EMPTY!!\n");
+	}
+	else
+	{
+		int i=1;
+		printf("The element removed is:%d\n",q[0]);
+		while(i<index)
+		{
+			q[i-1]=q[i];
+			i++;
+		}
+		index--;
+	}
+}
+void print()
+{
+	if(index==0)
+	{
+		printf("Queue is EMPTY!!\n");
+	}
+	else 
+	{
+     int i=0;
+     printf("The elements are:\n");
+	 while(i<index)
+	 {
+	 	printf("%d\n",q[i]);
+	 	i++;
+	 }		
+	}
+}
+void main()
+{
+	int a,k;
+	while(1)
+	{
+		printf("Select your option:\n");
+		printf("1.Enqueue\n2.Dequeue\n3.Print elements\n4.Exit\n");
+		scanf("%d",&a);
+		switch(a)
+		{
+			case 1: printf("Enter the element to be inserted:\n");
+			        scanf("%d",&k);
+			        enqueue(k);
+			        break;
+			case 2: dequeue();
+			        break;
+			case 3: print();
+			        break;
+			case 4: exit(0);
+			        break;
+		}
+	}
+	getch();
+}

Data-Structure-And-Algorithm-C-严蔚敏/ch3-stackqueue/Stack.c

@@ -0,0 +1,71 @@
+#include<stdio.h>
+#include<conio.h>
+#include<stdlib.h>
+int stk[100];
+int index=0;
+int n=5;
+void push(int k)
+{
+ if(index<n)
+ {
+ 	stk[index]=k;
+ 	index++;
+ }	
+ else
+ {
+ 	printf("Stack is FULL!!\n");
+ }
+}
+void pop()
+{
+	if(index!=0)
+	{
+	 printf("Element popped out is:%d\n",stk[index-1]);
+	 index--;
+    }
+    else
+    {
+    	printf("Stack is EMPTY!!\n");
+	}
+
+}
+void print()
+{
+	if(index==0)
+	{
+		printf("Stack is EMPTY!!\n");
+	}
+	else
+	{
+		int i=0;
+		printf("The elements in STACK are:\n");
+		while(i<index)
+		{
+			printf("%d\n",stk[i]);
+			i++;
+		}
+	}
+}
+int main()
+{
+	int a,k;
+	while(1)
+	{
+		printf("Select your option:\n");
+		printf("1.Push\n2.Pop\n3.Print\n4.Exit\n");
+		scanf("%d",&a);
+		switch(a)
+		{
+			case 1: printf("Enter the element to be pushed into the stack:");
+			        scanf("%d",&k);
+			        push(k);
+			        break;
+			case 2: pop();
+			        break;
+			case 3: print();
+			        break;
+			case 4:	exit(0);
+		}
+	}
+	getch();
+}