Compilare: main.cpp: In function 'int main()': main.cpp:35:21: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] else if (ch == ')') ^ main.cpp:44:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (!show) ^ main.cpp:13:9: warning: unused variable 'i' [-Wunused-variable] int i, j, x, m, cnt = 0; ^ main.cpp:13:12: warning: unused variable 'j' [-Wunused-variable] int i, j, x, m, cnt = 0; ^ main.cpp:13:15: warning: unused variable 'x' [-Wunused-variable] int i, j, x, m, cnt = 0; ^ main.cpp:13:18: warning: unused variable 'm' [-Wunused-variable] int i, j, x, m, cnt = 0; ^ main.cpp:13:21: warning: unused variable 'cnt' [-Wunused-variable] int i, j, x, m, cnt = 0; ^~~