Borderou de evaluare (job #251909)

Compilare: user.cpp: In function ‘int main()’: user.cpp:9:11: warning: right operand of comma operator has no effect [-Wunused-value] user.cpp:6:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:7:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:12:1: warning: ‘k’ may be used uninitialized in this function [-Wuninitialized]