Compilare: user.cpp: In function ‘int main()’: user.cpp:72: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:59: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:60: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int costsmen(int)’: user.cpp:27: warning: ‘i1’ may be used uninitialized in this function user.cpp:27: warning: ‘j1’ may be used uninitialized in this function