Compilare: user.cpp: In function ‘int main()’: user.cpp:17:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<strlen(s); j++) ^ user.cpp:19:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[j]==')') ^ user.cpp:32:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[j]==']' ) ^ user.cpp:46:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(y=0; y<strlen(s); y++) ^ user.cpp:10:9: warning: unused variable ‘x’ [-Wunused-variable] int x,n,i,varf=0,y,k=1,v[102],j; ^ user.cpp:10:15: warning: unused variable ‘varf’ [-Wunused-variable] int x,n,i,varf=0,y,k=1,v[102],j; ^