anagrame.cpp: In function 'int main()': anagrame.cpp:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result anagrame.cpp:49: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result anagrame.cpp:51: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccadBlDM.o: In function `main': anagrame.cpp:(.text+0x1db): warning: the `gets' function is dangerous and should not be used.