Question

Write a program thats reads from the users and calculate: 1- number of the words 2- number of digits 3- number of the prime digits

Answer 1

Program

#include<iostream>
using namespace std;
bool prime(int n)
{

for(int i=2;i<n;i++)//check if any factor exist between 1 and number
{
if(n%i==0)
return false;//if found return falase
}
return true;//if no factor found return true
}
int main()
{
string s;
cout<<"Enter string : ";
getline(cin,s);//read string

int words = 0, digit = 0, i,prime_digit=0;
for (i=0; s[i]!= '\0'; i++)
{
if (s[i] == ' ') //if space found increment words
words++;

else if (isdigit(s[i]) != 0) //if it is digit
{
if(prime(s[i]-'0') && (s[i]-'0')!=1 && (s[i]-'0')!=0)//check for prime and it is not 1 and 0
prime_digit++;//increment prime digits
digit++; //normal digits including prime
}
}
if(words>0)
cout<<"Number of words : "<<words+1<<endl;
else//if nothing is given
cout<<"Number of words : "<<words<<endl;
cout<<"Number of Digits : "<<digit<<endl;
cout<<"Number of Prime Digits : "<<prime_digit;

return 0;
}

input Enter string : hello Number of words : 0 Number of Digits : 0 Number of Prime Digits : o . .. Program finished with exit code o Press ENTER to exit console.|