text.cpp: In function 'int main()': text.cpp:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result text.cpp:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result text.cpp:35: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result text.cpp:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result /tmp/ccZer5Sr.o: In function `main': text.cpp:(.text+0x12b): warning: the `gets' function is dangerous and should not be used.