Exceptional Handling

Calculation

#include
#include using namespace std;
int main()
{
//int a,b,c;
//cin>>a>>b>>c;

float p,r,n;

   try
{
   cin>>p>>r>>n;
   if(cin)
{
   float amt = p * pow((1+(r/100)),n);
   cout<<"Compound Interest is:"<<amt-p;
}

   else
{
throw p;
}
}
   catch(float n)
{
   cout<<"Invalid input. Try again";
}
return 0;
}

Divide by zero exception

#include <iostream>
#include <ctype.h>
using namespace std;
int main() {
int a,b=244;
cin>>a>>b;
try
{
if( b!=0 && b!=244)
cout<<"VALID";

else
throw(b);
}
catch(int e)
{
cout<<"INVALID: Exception: 0";
}
return 0;
}

Checking Valid Data

#include <iostream>
#include <math.h>
using namespace std;
int main()
{
int a;
try
{
cin>>a;
if(cin)
{
if (a>0 && a<=100)
{

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cout<<"Valid Mark";
}
else
{
cout<<"Invalid Mark";
}
}

else
{
throw a;
}
}
catch(int a)
{
cout<<"Invalid input. Try again";
}
return 0;
}

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User defined Exception – Division

#include <iostream>

#include <exception>

using namespace std;

class Divide_By_Zero_Exception : public exception

{

public:

const char * what() const throw() {

return "Divide By Zero Exception";}

};

int main()

{

try

{

int a, b;

cin>>a>>b;

if(b==0)

{

Divide_By_Zero_Exception d;

throw d;

}

else

{

cout<<a/b;

}

catch(exception& e)

{

cout<<e.what();

}

return 0;

}

Finding Alphabets

#include <iostream>
#include <ctype.h>
using namespace std;
int main() {
char a,i;

for(i=0;i<2;i++)
{

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cin>>a;
try
{
if(isalpha(a))
cout<<"character "<<a<<" is alphabetic "<<endl;
else
throw(a);
}
catch(char e)
{
cout<<"character "<<e<<" is not alphabetic "<<endl;
}
}
return 0;
}

Multiple Exception – Default Exception

#include <iostream>
using namespace std;
int main() {
int N;
cin>>N;
try
{
if (N==1)
cout<<"Integer Exception\nException number=25";
else if(N==2)
cout<<"Float Exception\nException number=25.23";
else
throw(N);
}
catch(…)
{
cout<<"Default Exception\nWrong Number Used, Input 1 or 2";
}
return 0;
}

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Palindrome

#include <iostream>
#include <string.h>
using namespace std;
int main() {
int d=1,j=0,i;
char a[100],b[100];
cin>>a;
for(i=strlen(a)-1;i>=0;i–)
{
b[j]=a[i];
j++;
}
// cout<<a<<endl<<b;
try
{
if(strcmp(a,b)==0)
cout<<a<<" is a palindrome";
else
throw(d);
}
catch(int e)
{
cout<<a<<" is not a palindrome";
}
return 0;
}

Reverse – Array Exceptions

#include <iostream>
using namespace std;
int main() {
int a,b[1000],i;
cin>>a;
try
{
if(a<=20&&a>0)
{
for(i=0;i<a;i++)
cin>>b[i];
for(i=a-1;i>=0;i–)
cout<<b[i]<<" ";
}
else
{
throw(a);
}
}
catch(int e)
{
cout<<"Exception occurred";
}
return 0;
}

Factorial

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#include<iostream>
using namespace std;
int main()
{
int n,i,f=1;
cin>>n;
try
{
if(n>0&&n<20)
{
for(i=1;i<n+1;i++)
f=f*i;
cout<<"Factorial of a given Number is= "<<f;
}
else if(n<0)
throw (0);
if(n>20)
throw(1.0);
}
catch(int i)
{
cout<<"Factorial of a given Number is= "<<i;
}
return 0;
}

Exceptional – Operator Checking

#include <iostream>
using namespace std;
int main() {
double a,b,sum;
char c;
cin>>a>>c>>b;
try
{
switch(c)
{

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A

case '+':sum=a+b;
cout<<a<<c<<b<<"="<<sum;
break;
case '-':sum=a-b;
cout<<a<<c<<b<<"="<<sum;
break;
case '/':sum=a/b;
cout<<a<<c<<b<<"="<<sum;
break;
case '*':sum=a*b;
cout<<a<<c<<b<<"="<<sum;
break;
default:
throw(c);
}
}
catch(char c)
{
cout<<"Operation Error & is not a valid operator";
}
return 0;
}

Check input

#include <iostream>
using namespace std;

int main()
{
int nr = 0; char ch;
try
{
cin >> nr;
if(cin)
{
cin.get(ch);
if(ch=='.')
{
cout << "Floting" << endl;
}
else
{
cout << "Integer" << endl;
}
}
else
{
throw nr;
}
}
catch(int nr)
{
cout<<"Invalid input";
}
return 0;
}

Relational Operators – Exceptional Handling

#include <iostream>
using namespace std;
int main()
{
int a,b;
cin>>a>>b;
try
{
if(a>0 && b>0)
{
if(a>b)
{

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cout<<a<<"<"<<b<<"=0"<<endl;
cout<<a<<"<="<<b<<"=0"<<endl;
cout<<a<<"="<<b<<"=0"<<endl;
cout<<a<<">"<<b<<"=1"<<endl;
cout<<a<<">="<<b<<"=1"<<endl;
cout<<a<<"!="<<b<<"=1"<<endl;
}
else if(a<b)
{
cout<<a<<"<"<<b<<"=1"<<endl;
cout<<a<<"<="<<b<<"=1"<<endl;
cout<<a<<"="<<b<<"=0"<<endl;
cout<<a<<">"<<b<<"=0"<<endl;
cout<<a<<">="<<b<<"=0"<<endl;
cout<<a<<"!="<<b<<"=1"<<endl;
}
else
{
cout<<a<<"<"<<b<<"=0"<<endl;
cout<<a<<"<="<<b<<"=1"<<endl;
cout<<a<<"="<<b<<"=1"<<endl;
cout<<a<<">"<<b<<"=0"<<endl;
cout<<a<<">="<<b<<"=1"<<endl;
cout<<a<<"!="<<b<<"=0"<<endl;
}
}
else
throw a;
}
catch(…)
{
cout<<"No Negative Numbers";
}
return 0;
}

Vowels – Consonants Exceptional Handling

#include <iostream>
#include <string.h>
using namespace std;
int main() {
char a[30];
   int len, i, vow=0, cons=0;
   cin>>a;
   len = strlen(a);
   for(i=0; i<len; i++)
{
try
{
if(a[i]>=65 && a[i] <91 || a[i]>=97 && a[i] < 123)
{
   if(a[i] == 'a' || a[i] == 'e' || a[i] == 'i' || a[i] == 'o' || a[i] == 'u' || a[i] =='A' || a[i] == 'E' || a[i] == 'I' || a[i] == 'O' || a[i] == 'U')
{
vow++;
}
   else
   cons++;
}
   else
{
   throw a[i];
}
}

catch(char c)
{
cout<<"Exception Caught Numeric Value";
return 0;
}
}

cout<<"Vowels="<<vow;
cout<<endl<<"Consonants="<<cons;

return 0;
}