Compilare: user.cpp: In function ‘int main()’: user.cpp:11:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=prop.size()-1;i++) ^ user.cpp:12:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(prop[i]>=65&&prop[i]<=90 || prop[i]>=97&&prop[i]<=122) ^ user.cpp:14:34: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(prop[i]>=65&&prop[i]<=90 || prop[i]>=97&&prop[i]<=122) ^ user.cpp:8:11: warning: unused variable ‘n’ [-Wunused-variable] int i,n=1,s=0,c=0; ^