Answer to Question #33848 in C++ for amit kumar

Question

how can i check that a string contains integer or not in c language ? please write the full program

Answer 1

#include <stdio.h>
#include <iostream>
#include <string>


using namespace std;


bool contains(string &s)
{
int i = 0;
while (s[i] != '')
{
if (s[i] == '1' ||
s[i] == '2' ||
s[i] == '3' ||
s[i] == '4' ||
s[i] == '5' ||
s[i] == '6' ||
s[i] == '7' ||
s[i] == '8' ||
s[i] == '9' ||
s[i] == '0')
++i;
else return false;
}
return true;
}


int main()
{
cout << "Enter string: ";
string str;
cin >> str;
cout << ((contains(str) == true) ? "Your string is an integer" : "Your string is not an integer");
cin.get();
cin.get();
return 0;
}