Compilare: main.cpp: In function 'std::set<int> expresie()': main.cpp:34:25: warning: array subscript has type 'char' [-Wchar-subscripts] b = vars[cur]; ^ main.cpp:43:29: warning: array subscript has type 'char' [-Wchar-subscripts] c = vars[cur]; ^ main.cpp: In function 'int main()': main.cpp:70:20: warning: array subscript has type 'char' [-Wchar-subscripts] vars[ch].insert(a); ^ main.cpp:76:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n", rez.size()); ^ main.cpp:59:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("multimi4.in", "r", stdin); ^ main.cpp:60:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("multimi4.out", "w", stdout); ^ main.cpp:63:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &n); ^ main.cpp:67:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c=%d-%d/%d ", &ch, &a, &b, &c); ^