Question

A file name is supposed to be in the form filename , ext . Write a function that will determine whether a string is in the form of a name followed by a dot followed by a three - character extension , or not . The function should return 1 for logical true if it is in that form , or 0 for false if not ,

Answer 1

#include <iostream>

using namespace std;

int isValidName(string name){
   int index=name.find(".");
   int size=name.length();
   cout<<name<<": ";
   return (size-4)==index;
}
int main(){
   (isValidName("input.txt"))?cout<<"Valid\n":cout<<"Invalid\n";
   (isValidName("input.atxt"))?cout<<"Valid\n":cout<<"Invalid\n";
   (isValidName("input.csv"))?cout<<"Valid\n":cout<<"Invalid\n";
   (isValidName("input.cs"))?cout<<"Valid\n":cout<<"Invalid\n";
  
}

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