reteta.cpp: In function 'int main()': reteta.cpp:8: warning: unused variable 'f' reteta.cpp:8: warning: unused variable 'nr1' reteta.cpp:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result reteta.cpp:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result reteta.cpp:11: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccMNvGqr.o: In function `main': reteta.cpp:(.text+0x5d): warning: the `gets' function is dangerous and should not be used.