basic programs

l3.c

#include<stdio.h>
#include<stdlib.h>

 int s[100],top=-1,max,i;

 int push();
 int pop();
 int display();
 int palindrome();
 
 int main()
 { 
     int o;
     printf("Enter the max size\n");
     scanf("%d",&max);
     while (1)
     {
        printf("\n1.push\n2.pop\n3.display\n4.palindrome\n5.exit\n");
        printf("enter choice\n");
        scanf("%d",&o);
        switch(o)
        {
            case 1: push();
                    break;
            case 2: pop();
                    break;
            case 3: display();
                    break;
            case 4: palindrome();
                    break;
            case 5: exit(0);
            default: printf("invalid option\n");
        }

     }
     
     return 0;
 }
 
int push()
{
    int x;
    if(top==max-1)
    {
        printf("overflow\n");
    }
    else
    {
        printf(" enter element\n");
        scanf("%d",&x);
        s[++top]=x;
    }
    

    return 0;
}

int pop()
{
    int x;
    if(top==-1)
    {
        printf("underflow\n");
    }
    else
    {
        x=s[top--];
        printf("popped elements:%d\t",x);
    }
    
    return 0;
}

int display()
{
    if(top==0)
    {
        printf("stack is underflow\n");
        return 0;
    }
    else
    {
        for(i=0;i<=top;i++)
        {
            printf("%d\t",s[i]);
        }
    }
    
    return 0;
}
int palindrome()
{ 
    int flag=0;
    for(i=0;i>(top/2)+1;i++)
    {
        if(s[i]!=s[top-i]) flag=1;
    }
    if(flag) printf("Not palindrome\n");
    else printf("plaindrome\n");
    return 0;
}

p1.c

#include <stdio.h>
#include <stdlib.h>

int main()
{ int a=7,b=2;
   // printf("enter two number !\n");
    //scanf("%d%d",&a,&b);
    printf("%d",a/b);

    printf("%d\n",(float)a/b);
    printf("%d\n",(float)a/(float)b);
    printf("%d\n",a/(float)b);

    printf("%f\n",a/b);
    printf("%f\n",(float)(a/b));
    printf("%f\n",(float) a/b);
    printf("%f\n",(float)a/(float)b);
    printf("%f\n",a/(float)b);
    return 0;
}

p2.c

/* Program to compare 2 number without using relational operators*/
#include <stdio.h>
#include <stdlib.h>

int main()
{ int a,b;
    printf("Enter two numbers\n");
    scanf("%d%d",&a,&b);
    if(a^b) printf(" not equal");
    else printf(" equal");
    return 0;
}