Compilare: user.cpp: In function ‘void prel()’: user.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s)-1;i++) ^ user.cpp:37:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((int)s[i]>=65 && (int)s[i]<=90 || (int)s[i]>=97 && (int)s[i]<=112) nrl++; ^ user.cpp:39:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((int)s[i]>=65 && (int)s[i]<=90 || (int)s[i]>=97 && (int)s[i]<=112 && s[i+1]==' ') nrc++; ^