Compilare: user.cpp: In function ‘int main()’: user.cpp:46:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (j=nr; j!=0 && semn[j]!='(' && val[s[i]]<=val[semn[j]]; j--) ^ user.cpp:46:74: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (j=nr; j!=0 && semn[j]!='(' && val[s[i]]<=val[semn[j]]; j--) ^ user.cpp: In function ‘int valoare(int, int, char)’: user.cpp:15:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:18:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in","r",stdin); ^ user.cpp:19:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out","w",stdout); ^ user.cpp:20:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s+1); ^ /tmp/ccIs4OAZ.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.