fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int atoi(string str);
  4. int main()
  5. {
  6. 	int t;
  7. 	cin>>t;
  8. 	while(t--)
  9. 	{
  10. 		string s;
  11. 		cin>>s;
  12. 		cout<<atoi(s)<<endl;
  13. 	}
  14. }
  15.  
  16. /*This is a function problem.You only need to complete the function given below*/
  17. /*You are required to complete this method */
  18. bool isnumeric(char c){
  19.     if(c >= '0' && c <= '9')
  20.         return true;
  21.     return false;    
  22. }
  23. int atoi(string str)
  24. {
  25.     int i = 0;
  26.     int result = 0;
  27.     int sign  = 1;
  28.     while(str[i]) {
  29.         if(str[i] == ' '){
  30.             i++;
  31.         }
  32.         if(str[i] == '-') {
  33.             sign = -1;
  34.             i++;
  35.         }
  36.         if(isnumeric(str[i])==false){
  37.             //cout << -1 << endl;
  38.             return -1;
  39.         }
  40.         result = result * 10 + str[i++] - '0';
  41.     }
  42.     return sign * result;
  43. }
Success #stdin #stdout 0s 4172KB
comments (?)
stdin
copy 
2
1234
12e
stdout
copy 
1234
-1
https://ideone.com/Wq9w3T
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!