multiple stacks in an array

1 ANSWERS

1. amomipais82
   

   Hi,
   #include<stdio.h>
   #include<malloc.h>
   
   
   int top1 = -1,top2 = 50;
   int bottom1, bottom2;
   
   int push(int *base,int data,int stack_no);
   int pop(int *base,int stack_no);
   
   int main()
   {
     int arr[50]; ///array to be used for stack implementation
   
   
     push(arr,10,1);
     push(arr,20,2);
   
     printf("\t %d",pop(arr,2));
     printf("\t %d",pop(arr,1));
     printf("\t %d",pop(arr,1));
   
   
     return 0;
   }
   
   
   
   int push(int *base,int data,int stack_no)
   {
   
     if( top1+1 == top2)
     {
        return -1;
     }
   
     switch(stack_no)
     {
     case 1:
        base[++top1] = data;
        break;
     case 2:
        base[--top2] = data;
        break;
     default:
        return -1;
     }
   
     return 0;
   }
   
   
   int pop(int *base,int stack_no)
   {
     switch(stack_no)
     {
     case 1:
        if(-1 == top1)
           break;
        else
           return base[top1--];
   
        break;
   
     case 2:
        if(50 == top2)
           break;
        else
           return base[top2++];
   
        break;
   
     default:
        return -1;
        break;
     }
   
     return -1;
   }

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