Borderou de evaluare (job #58955)

Compilare: user.cpp: In function ‘int main()’: user.cpp:9:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] user.cpp:15:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] user.cpp:7:9: warning: variable ‘i’ set but not used [-Wunused-but-set-variable] user.cpp:7:27: warning: unused variable ‘c2’ [-Wunused-variable] user.cpp:5:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]