Borderou de evaluare (job #18397)

Compilare: user.cpp: In function ‘int main()’: user.cpp:26:37: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] user.cpp:8:19: warning: unused variable ‘b’ [-Wunused-variable] user.cpp:6:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:14:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:4:5: warning: ‘a’ is used uninitialized in this function [-Wuninitialized]