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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. int a;
  6. float a;
  7. double a;
  8. cout << a; // ktore a wyswietli?
  9. return 0;
  10. }
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
Standard input is empty
compilation info
prog.cpp: In function 'int main()':
prog.cpp:6:8: error: conflicting declaration 'float a'
  float a;
        ^
prog.cpp:5:6: note: previous declaration as 'int a'
  int a;
      ^
prog.cpp:7:9: error: conflicting declaration 'double a'
  double a;
         ^
prog.cpp:5:6: note: previous declaration as 'int a'
  int a;
      ^
stdout
Standard output is empty