oop lab 21/10

//handle divided by 0 exception

#include<iostream>
#include<exception>

using namespace std;

int main()
{

    int a,b;
    cout<<"\n Enter the value of a & b:";
    cin>>a>>b;
    int x=a-b;
    try
    {
        if(b!=0)
            cout<<"\n Result (a/x) = "<<a/x<<endl;

        else

            throw(x);
    }

    catch(int i)
    {
        cout<<"\n Exception caught: DIVIDE BY ZERO"<<endl;
    }
    cout<<"\n END";

    return 0;
}


// first alphabet in not a vowel throw exception

#include<iostream>
#include<exception>

using namespace std;
int main()
{

    char *p;
    cout<<"\n Enter a srtring(lowercase):";
    cin>>p;

    try
    {
        if((p[0]=='a')||(p[0]=='e')||(p[0]=='i')||(p[0]=='o')||(p[0]=='u'))
            cout<<"\n "<<p<<endl;

        else
            throw(p[0]);
    }
    catch(char c)
    {
        cout<<"EXCEPTION CAUGHT not a vowel";
    }

    return 0;
}



// input aplhanumeric string if first character is not an alphabet throw an exception

#include<iostream>
#include<exception>
#include<ctype.h>

using namespace std;

int main()
{

    char *p;
    cout<<"\n Enter an alphanumeric string:";
    cin>>p;

    try
    {
        if(!isalpha(p[0]))
            throw(p[0]);

        else
            cout<<p<<endl;
    }

    catch(char c)
    {
        cout<<"EXCEPTION CAUGHT not an alphabet";
    }
    return 0;
}


// 4th program

#include<iostream>
#include<exception>
#include<ctype.h>
#include<string.h>

using namespace std;

int main()
{

    char p[20];
    cout<<"\n Enter an alphanumeric string:";
    cin>>p;

    try
    {
        if(!isalpha(p[0]))
            throw(p[0]);
        if(isalpha(p[2]))
            throw 4;
        if(p[strlen(p)-1]!='0')
            throw 1.0;

        else
            cout<<p<<endl;
    }

    catch(char c)
    {
        cout<<"EXCEPTION CAUGHT not an alphabet";
    }
    catch(int i)
    {
        cout<<"\n EXCEPTION CAUGHT not an integer";
    }
    catch(double f)
    {
        cout<<"\n EXCEPTION CAUGHT last character not a zero";
    }

    cout<<endl;
    return 0;
}