stack program in c| ds gtu program

Stack has two ended in which one end the data is inserted called push and from other the data is removed called pop

• STACK

#include<stdio.h> #include<stdlib.h> int a[100],tos=-1,max=100; void display() { printf("\nvalues are:"); for(int i=0;i<=tos;i++) { printf("\t %d ",a[i]); } } void push() { int value; if(tos==max) printf("\nStack is full"); else { tos++; printf("\nEnter value to add: "); scanf("%d",&value); a[tos] = value; } } void pop() { if(tos==-1) { printf("\nSTack is already empty."); } else { a[tos]='\0'; tos--; } } void peep() { int m; printf("Enter the position to peep:"); scanf("%d",&m); if(m>=1&&m<=tos) printf("\n The value at %d is %d",m,a[m-1]); else printf("\nEnter valid number"); } void change() { int m,value; printf("Enter position to change: "); scanf("%d",&m); if(m>=1&&m<=tos) { printf("Enter new value: "); scanf("%d",&value); a[m-1]=value; } else printf("\nEnter valid number"); } main() { int choice; while(1) { printf("\n1.PUSH\n2.POP\n3.PEEP\n4.CHANGE\n5.DISPLAY\n6.EXIT\n"); scanf("%d",&choice); switch(choice) { case 1: push(); break; case 2: pop(); break; case 3: peep(); break; case 4: change(); break; case 5: display(); break; case 6: exit(0); default: printf("Enter Valid Choice "); break; } } }

happy coding😇