azeval.cpp: In function 'int main()': azeval.cpp:81: warning: suggest explicit braces to avoid ambiguous 'else' azeval.cpp:88: warning: suggest explicit braces to avoid ambiguous 'else' azeval.cpp:93: warning: suggest explicit braces to avoid ambiguous 'else' azeval.cpp:98: warning: suggest explicit braces to avoid ambiguous 'else' azeval.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result azeval.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result azeval.cpp:30: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccRwe9BH.o: In function `main': azeval.cpp:(.text+0x243): warning: the `gets' function is dangerous and should not be used.