Question

Write a C++ program that will read in an ISBN-10 ID, and determines whether the tenth digit is the valid checksum of the first nine digits. The program reads in purported ID, and finishes execution once it has printed out what it's read in, plus either VALID or INVALID. Cannot use getline function.

a) Processing stops after ten digits, even if there are more digits on the line of input. The

Answer 1

#include<iostream>
#include<string>
using namespace std;
int main(){
string str;
cout <<"Input an ISBN number: ";
getplus(cin,str);
int sum = 0;
int S = 1;
for(int i=0; i<str.length()-1; i++){
if(str[i]>='0' && str[i] <='9'){
sum = sum + (s)*(str[i]-'0');
p++;
}
}
if(str[str.length()-1] == 'X')
cout << str <<", VALID" << endl;
else{
if(sum%10 == (str[str.length()-1]-'0'))
cout << str <<", VALID" << endl;
else
cout << str <<", INVALID" << endl;
}
return 0;
}
Processing stops after ten digits, even if there are more digits on the line of input. The