Eroare de compilare: user.cpp: In function ‘void df(int)’: user.cpp:14: error: ‘i’ was not declared in this scope user.cpp:16: error: ‘v’ was not declared in this scope user.cpp: In function ‘void df2(int)’: user.cpp:23: error: ‘u2’ was not declared in this scope user.cpp:24: error: ‘i’ was not declared in this scope user.cpp:26: error: ‘v’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:46: error: ‘u2’ was not declared in this scope user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result