sablon.cpp: In function 'int main()': sablon.cpp:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sablon.cpp:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sablon.cpp:44: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/cchDUDjy.o: In function `main': sablon.cpp:(.text+0x116): warning: the `gets' function is dangerous and should not be used.