Eroare de compilare: user.cpp:3: error: '::main' must return 'int' user.cpp: In function 'int main()': user.cpp:7: error: 'ifstream' was not declared in this scope user.cpp:7: error: expected `;' before 'in' user.cpp:9: error: 'in' was not declared in this scope user.cpp:10: warning: comparison between signed and unsigned integer expressions user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp:30: error: 'ofstream' was not declared in this scope user.cpp:30: error: expected `;' before 'ki' user.cpp:34: warning: statement has no effect user.cpp:35: error: 'ki' was not declared in this scope user.cpp:40: warning: statement has no effect user.cpp:41: error: 'ki' was not declared in this scope