cuvant.cpp: In function 'int main()': cuvant.cpp:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvant.cpp:25: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvant.cpp:26: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/cc6Rz8lR.o: In function `main': cuvant.cpp:(.text+0x16b): warning: the `gets' function is dangerous and should not be used.