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  1. #include <cstdio>
  2.  
  3. int main() {
  4. 	int a, b, r;
  5. 	r = scanf( "%d%d", &a, &b );
  6. 	printf( "a=%d, b=%d\n", a, b );
  7. 	r = scanf( "%d%d", &a, &b );
  8. 	printf( "a=%d, b=%d\n", a, b );
  9. 	if ( r == 1 ) {
  10. 		b = -1; // represents null
  11. 	}
  12. 	printf( "a=%d, b=%d\n", a, b );
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0s 3344KB
comments (?)
stdin
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1 2
3
stdout
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a=1, b=2
a=3, b=2
a=3, b=-1
https://ideone.com/y3IJAZ
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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