Borderou de evaluare (job #366787)

Compilare: user.cpp: In function ‘int calc(int, int)’: user.cpp:72:5: warning: unused variable ‘ok’ [-Wunused-variable] user.cpp: In function ‘int main()’: user.cpp:124:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:125:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:127:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:130:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:137:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘int calc(int, int)’: user.cpp:122:7: warning: control reaches end of non-void function [-Wreturn-type]