expresie1.cpp: In function 'int main()': expresie1.cpp:75: warning: suggest explicit braces to avoid ambiguous 'else' expresie1.cpp:107: warning: suggest explicit braces to avoid ambiguous 'else' expresie1.cpp:32: warning: unused variable 'aux' expresie1.cpp:32: warning: unused variable 'j' expresie1.cpp:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result expresie1.cpp:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result expresie1.cpp:33: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/ccgIIVhf.o: In function `main': expresie1.cpp:(.text+0xa6): warning: the `gets' function is dangerous and should not be used.