scp.cpp: In function 'void afisare()': scp.cpp:89: warning: unused variable 'dif' scp.cpp: In function 'int main()': scp.cpp:125: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scp.cpp:126: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scp.cpp:127: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result