-
Notifications
You must be signed in to change notification settings - Fork 0
/
inputValidation.cpp
56 lines (46 loc) · 1.05 KB
/
inputValidation.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/** Program Name: inputValidation.hpp
** Author: Thomas Fattah
** Date: 6/28/19
** Description: Input validation function definition, which contains getInt function that ensures a user may only
** enter an integer and prompts user until they do so correctly. If user correctly enters an integer, it returns
** that integer.
**/
// With assistance from https://www.learncpp.com/cpp-tutorial/185-stream-states-and-input-validation/
#include "inputValidation.hpp"
using std::cout;
using std::endl;
using std::cin;
using std::string;
using std::stringstream;
int getInt()
{
int intNum = 0;
string strNum = "";
bool isValid = false;
do
{
getline(cin, strNum);
int length = strNum.length();
for (int i = 0; i < length; i++)
{
if(!isdigit(strNum[i]))
{
cout << "Please enter valid input." << endl;
return 0; // essentially break
}
else
{
if (i == length - 1)
{
{
isValid = true;
}
}
}
}
} while(!isValid);
stringstream inputStream;
inputStream << strNum;
inputStream >> intNum;
return intNum;
}