fractie1.cpp: In function 'int main()': fractie1.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result fractie1.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result fractie1.cpp:29: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/cceCxp4U.o: In function `main': fractie1.cpp:(.text+0x156): warning: the `gets' function is dangerous and should not be used.