scor2.cpp: In function 'int main()': scor2.cpp:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scor2.cpp:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scor2.cpp:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result scor2.cpp:44: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result scor2.cpp:60: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result scor2.cpp:61: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result scor2.cpp:63: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccsGltSR.o: In function `main': scor2.cpp:(.text+0x30a): warning: the `gets' function is dangerous and should not be used.