dreptunghiuri.cpp: In function 'int main()': dreptunghiuri.cpp:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dreptunghiuri.cpp:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dreptunghiuri.cpp:45: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result dreptunghiuri.cpp:47: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccZxrn8m.o: In function `main': dreptunghiuri.cpp:(.text+0x2c8): warning: the `gets' function is dangerous and should not be used.