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