Compilare: user.cpp: In function ‘int main()’: user.cpp:29:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if((s[i]=='x'||s[i]=='y'||s[i]=='z'||s[i]=='t')&&(s[i-1]=='+'||s[i-1]=='-')) if(s[i-1]=='+') sum++; ^ user.cpp:8:5: warning: unused variable ‘n’ [-Wunused-variable] int n,i,cerinta,a,b,e,nr,p,j,cif,sum=0,semn; ^ user.cpp:8:28: warning: unused variable ‘j’ [-Wunused-variable] int n,i,cerinta,a,b,e,nr,p,j,cif,sum=0,semn; ^