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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. int strToNumber(char *s) {
  6.     int x = 0, i = 0;
  7.     while (i < strlen(s)){
  8.         x = x * 10 + int(s[i] % 10 - '0');
  9.         ++i;
  10.     }
  11.     return (x * x);
  12. }
  13. int main() {
  14. 	char c[1001];
  15. 	cin.getline(c, 1001);
  16. 	cout << strToNumber(c);
  17. 	return 0;
  18. }
Success #stdin #stdout 0.01s 5256KB
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https://ideone.com/Zy9biw
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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