int main() { int x; return &x; }
Standard input is empty
prog.cpp: In function 'int main()': prog.cpp:3:10: error: invalid conversion from 'int*' to 'int' [-fpermissive] return &x; ^ prog.cpp:2:6: warning: address of local variable 'x' returned [-Wreturn-local-addr] int x; ^
Standard output is empty