Compilare: user.cpp: In function ‘int main()’: user.cpp:15:59: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(strlen(m[i])>strlen(s)||strlen(m[i])==strlen(s)&&strcmp(m[i],s)<0) strcpy(s,m[i]); ^ user.cpp:25:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i!=j&&strlen(m[j])>l) ^ user.cpp:28:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<strlen(m[j]);k++) ^