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  • 1. /* Write C programs that implement stack (its operations) using i) Arrays */#include<stdio.h>#include<conio.h>int st_arr[20];int t=-1;void push_ele(int ele);int pop_ele();void display_ele();void main(){ char choice,num1=0,num2=0; while(1) { clrscr(); printf("======================================"); printf("ntt MENU "); printf("n======================================"); printf("n[1] Using Push Function"); printf("n[2] Using Pop Function"); printf("n[3] Elements present in Stack");
  • 2. printf("n[4] Exitn");printf("ntEnter your choice: ");fflush(stdin);scanf("%c",&choice);switch(choice-0){ case 1: { printf("ntElement to be pushed: "); scanf("%d",&num1); push_ele(num1); break; } case 2: { num2=pop_ele(1); printf("ntElement to be popped: %dnt",num2); getch(); break; }
  • 3. case 3: { display_ele(); getch(); break; } case 4: exit(1); break; default: printf("nYour choice is invalid.n"); break; } }}/*Implementing the push() function. */void push_ele(int ele){ if(t==99) { printf("STACK is Full.n");
  • 4. getch(); exit(1); } st_arr[++t]=ele;}/*Implementing the pop() function. */int pop_ele(){ int ele1; if(t==-1) { printf("ntSTACK is Empty.n"); getch(); exit(1); } return(st_arr[t--]);}/*Implementing display() function. */void display_ele(){ int k; printf("ntElements present in the stack are:nt");
  • 5. for(k=0;k<=t;k++) printf("%dt",st_arr[k]);}/* Write C programs that implement stack (its operations) using ii) Pointers */#include<stdio.h>#include<conio.h>struct st_point{ int ele; struct st_point *l;}*t;int i;void push_ele(int j);int pop_ele();void display_ele();void main(){
  • 6. char choice,num1=0,num2=0;int i;while(1){ clrscr(); printf("======================================"); printf("ntt MENU "); printf("n======================================"); printf("n[1] Using Push Function"); printf("n[2] Using Pop Function"); printf("n[3] Elements present in Stack"); printf("n[4] Exitn"); printf("ntEnter your choice: "); fflush(stdin); scanf("%c",&choice); switch(choice-0) { case 1: { printf("ntElement to be pushed:"); scanf("%d",&num1); push_ele(num1); break;
  • 7. }case 2:{ num2=pop_ele(1); printf("ntElement to be popped: %dnt",num2); getch(); break;}case 3:{ printf("ntElements present in the stack are:nt"); display_ele(); getch(); break;}case 4: exit(1); break;default: printf("nYour choice is invalid.n");
  • 8. break; } }}/*Inserting the elements using push function*/void push_ele(int j){ struct st_point *m; m=(struct st_point*)malloc(sizeof(struct st_point)); m->ele=j; m->l=t; t=m; return;}/*Removing the elements using pop function*/int pop_ele(){ if(t==NULL) { printf("nSTACK is Empty."); getch(); exit(1);
  • 9. } else { int i=t->ele; t=t->l; return (i); }return 0;}/*Displaying the elements */void display_ele(){ struct st_point *pointer=NULL; pointer=t; while(pointer!=NULL) { printf("%dt",pointer->ele); pointer=pointer->l; }}

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