Answer Posted / kumar

#include <iostream>
#include <string>

using namespace std;

int main ()
{
string str;
cout << "Enter a 4 digit number with '7' in it:";
cin >> str;
str.resize(4);
cout << "The 4 digit numebr you have entered is:" << str
<<endl;
int ipos = 0, count =0;
ipos = str.find_first_of('7');
while (ipos!=-1)
{
count ++;
ipos = str.find_first_of('7',(ipos+1));
}
if (count)
cout <<"Number of '7' in the string: "<<count<<endl;
else
cout <<"There are no 7's in the string entered"<<endl;
return 0;
}

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