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stacks_using_array.c
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stacks_using_array.c
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#include<stdio.h>
#define MAX 6
int top=-1;
void push(int ele, int ar[], int size){
//printf("top is %d\n", top);
if(top==(size-1)){
printf("stack overflow\n");
}
else{
top=top+1;
ar[top]=ele;
//printf("arr[top] is %d\n",ar[top]);
}
}
void pop(int ar[]){
if(top==-1){
printf("stack underflow\n");
}
else{
top--;
}
}
void display(int ar[]){
if(top==-1){
printf("the stack is empty\n");
}
else{
printf("STACK-:\n");
for(int i=top;i>=0;i--){
printf("%d\n",ar[i]);
}
}
}
void main(){
int a[MAX];
while(1){
printf("enter 1 to push an element\n");
printf("enter 2 to pop an element\n");
printf("enter 3 to display\n");
printf("enter 4 to exit\n");
int choice;
scanf("%d",&choice);
switch(choice){
case 1:
printf("enter element\n");
int b;
scanf("%d",&b);
push(b,a,MAX);
break;
case 2:
pop(a);
break;
case 3:
display(a);
break;
case 4:
exit(1);
break;
}
}
}