C++
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x
12
1
2
int main(){3
4
int *&r = ip, *ip; 5
const int y = 50;6
int x = 50 + y;7
std::cout << x << " ";8
std::cout << r << " " << *ip;9
return 0;10
11
}12
$ g++ prog.cc -Wall -Wextra -std=c++98 -pedantic
Start
prog.cc: In function 'int main()':
prog.cc:4:15: error: 'ip' was not declared in this scope
4 | int *&r = ip, *ip;
| ^~
1
Finish