UVA 465 - Overflow

Description

1)

The C library function double atof(const char *str) converts the string argument str to a floating-point number (type double).

2)

 printf(" int min : %d ", INT_MIN); // INT_MIN, INT_MAX, SCHAR_MIN, SCHAR_MAX ....etc  
     printf(" int max : %d  ",INT_MAX);// pre defined constants to get the values of datatypes      

code:

#include<bits/stdc++.h>
using namespace std;
#include<string.h>
int main()
{
    long long l,x,sum,i;
    long double aa,bb;
    char a[1000],ch,b[1000];
    while(cin>>a)
    {
        cin>>ch>>b;
        aa=atof(a);
        bb=atof(b);
        //cout<<aa<<" "<<bb<<endl;
        //cout<<a<<" "<<b<<" "<<INT_MAX<<endl;
        cout<<a<<" "<<ch<<" "<<b<<endl;
        if(aa>INT_MAX)
            cout<<"first number too big\n";
        if(bb>INT_MAX)
            cout<<"second number too big\n";
        if(ch=='+')
        {
            if(aa+bb>INT_MAX)
                cout<<"result too big\n";

            }
        else if(ch=='*')
        {
            if(aa*bb>INT_MAX)
                cout<<"result too big\n";
        }
    }
    return 0;
}