showroom.cpp: In function 'int main()': showroom.cpp:110: warning: comparison between signed and unsigned integer expressions showroom.cpp:72: warning: unused variable 'q' showroom.cpp:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result showroom.cpp:71: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result showroom.cpp:74: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result showroom.cpp:77: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccy7yOxE.o: In function `main': showroom.cpp:(.text+0x550): warning: the `gets' function is dangerous and should not be used.