Compilare: main.cpp: In function 'int main()': main.cpp:21:34: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (vf>=0 && (c==')' && st[vf]=='(' || c==']' && st[vf]=='[' || c=='}' && st[vf]=='{')) ~~~~~~~^~~~~~~~~~~~~~ main.cpp:21:84: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if (vf>=0 && (c==')' && st[vf]=='(' || c==']' && st[vf]=='[' || c=='}' && st[vf]=='{')) ~~~~~~~^~~~~~~~~~~~~~ main.cpp:13:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while (f>>c) ^~~~~ main.cpp:28:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' if (nr>nrmax) nrmax=nr; ^~