Compilare: user.cpp: In function ‘int main()’: user.cpp:12:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(s)){ ^ user.cpp:13:22: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i]>='a' and s[i]<='z' or s[i]>='A' and s[i]<='Z') ^ user.cpp:18:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(s)){ ^ user.cpp:19:22: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i]>='a' and s[i]<='z' or s[i]>='A' and s[i]<='Z' or s[i]=='-'){ ^ user.cpp:21:29: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(s[i]>='a' and s[i]<='z' or s[i]>='A' and s[i]<='Z' or s[i]=='-') ^