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  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <climits>
  4. using namespace std;
  5.  
  6. static int test(const char *p) {
  7. 	char *endptr;
  8. 	const long int argument = strtol (p, &endptr, 10);  // <cstdlib>
  9. 	if(endptr[0] != '\0') {
  10. 	    cerr<< p << ": arguments must be integer" << endl;
  11. 	    return -1;
  12. 	} else if (argument == LONG_MIN || argument == LONG_MAX) {  // <climits>
  13. 	    // Alternatively you can check for ERANGE in errno
  14. 	    cerr<< p << ": arguments value is out of range" << endl;
  15. 	    return -1;
  16. 	} else {
  17. 	    /* Right type of argument received */
  18. 	    cout << p << " parsed as integer" << endl;
  19. 	    return 0;
  20. 	}
  21. }
  22.  
  23. int main() {
  24. 	char inp[128];
  25. 	while(cin >> inp) {
  26. 		test(inp);
  27. 	}
  28. 	return 0;
  29. }
Success #stdin #stdout #stderr 0s 4368KB
comments (?)
stdin
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-1 aasmsnsak 42 1111111111111111111111111111111111111 -1111111111111111111111111111111111111 12345678 -98765432 42test test42 0 01
stdout
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-1 parsed as integer
42 parsed as integer
12345678 parsed as integer
-98765432 parsed as integer
0 parsed as integer
01 parsed as integer
stderr
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aasmsnsak: arguments must be integer
1111111111111111111111111111111111111: arguments value is out of range
-1111111111111111111111111111111111111: arguments value is out of range
42test: arguments must be integer
test42: arguments must be integer
https://ideone.com/yPV7KR
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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