c_cpp 用于检查输入是整数还是字符串的程序

Posted 2021-05-14

#include<bits/stdc++.h>
using namespace std;

int main() {
    string s;
    getline(cin, s);
    int c=0;
    for (int i=0;i<s.length();i++)
        if ((s[i]- '0' > 9) || (s[i]- '0' < 0)){
            cout<< "Not an integer\n";
            exit(0);
        }
    cout<< "Integer :)";

}