Compilare: main.cpp: In function 'int expresie()': main.cpp:22:13: warning: unused variable 'first' [-Wunused-variable] int first=j; ^~~~~ main.cpp: In function 'int termen()': main.cpp:34:13: warning: unused variable 'first' [-Wunused-variable] int first=j; ^~~~~ main.cpp: In function 'int main()': main.cpp:75:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bool.in","r",stdin); freopen("bool.out","w",stdout); ^ main.cpp:75:69: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bool.in","r",stdin); freopen("bool.out","w",stdout); ^