Compilare: main.cpp: In function 'int main()': main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i=0;i<expr.size();i++) | ~^~~~~~~~~~~~ main.cpp:42:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 42 | if (expr[i-1]=='-') | ^~ main.cpp:45:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 45 | cx = cx + semn*nrcrt; | ^~ main.cpp:87:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 87 | for (int x=a;x<=b;x++) | ^~~ main.cpp:95:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 95 | cout << endl; | ^~~~