ordonare.cpp: In function 'int main()': ordonare.cpp:23: warning: comparison between signed and unsigned integer expressions ordonare.cpp:36: warning: comparison between signed and unsigned integer expressions ordonare.cpp:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ordonare.cpp:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ordonare.cpp:21: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result ordonare.cpp:22: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccAnl0qP.o: In function `main': ordonare.cpp:(.text+0x8d): warning: the `gets' function is dangerous and should not be used.