Comments by Rahul Thengadi (Top 20 by date)

I tried your solution, it ended up with input(3,1)=>output(4) and for input('a','b')=>output(195)

I come up to conclusion that it can't be solved logically using normal functions.Because the point you initialise num1 and num2 variables(i.e. the input which is hardcoded). For "intger type" it get "decimal value" and for "character"(i.e. int num1 = 'a') it also a decimal value('a' gets value 97 in ascii which is also decimal) no matter which logic or condition you apply, you can't end up the expected solution.
The only way it can be solved using polymorphism and RTTI (i.e. Run Time Type Information).I am working on it.

The solution you have given was solution to my next problem.You have explained it very well.
Thank you so much...

Probably the compiler version doesn't support stoi()

Ya it is in my program

Thanks , the validNum() is much useful, i was nearly close to the answer

Finally getting 'stoi' was not declared in this scope

Hardcoded means sample input values should written in program i.e. program should not prompt for input values to user

ya i will ensure from that sorry

#include<iostream>

using std::cout;
using std::cin;
using std::endl;

int add(int num1,int num2)
{
if(isdigit(num1) != 0 && isdigit(num2) != 0)
{
cout << num1+num2;
}
else
cout << "Error" << endl;
}

int main()
{
int num1 = 3;
int num2 = 1;

add(num1,num2);

num1 = 'a'; // here num1 value is 97 i.e. ASCII value of character a
num2 = 'b'; // here num1 value is 97 i.e. ASCII value of character a

add(num1,num2);

return 0;
}

Output: Error
Error

Ya i think but the inputs were hard coded

As the int num1 = 'a';
Here num1 = 97 // ASCII value of 'a'
isdigit can't handle it

I just got the solution that i was using cout << "\n"; to print next column in matrix instead i must use ofstream obect i.e. outFile << "\n"; as i want output in textfile

Yes but in vmware workstation cs50 appliance

I just got the solution that i was using cout << "\n"; to print next column in matrix instead i must use ofstream obect i.e. outFile << "\n"; as i want output in textfile