Compilare: user.cpp: In function ‘int main()’: user.cpp:14:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a=='(') ^ user.cpp:32:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a=='[') ^ user.cpp:50:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a=='{') ^ user.cpp:68:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a==')') ^ user.cpp:104:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a==']') ^ user.cpp:140:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a=='}') ^ user.cpp:178:5: warning: assuming signed overflow does not occur when assuming that (X + c) < X is always false [-Wstrict-overflow] for(i=1;i<=n;i++) ^