Compilare: main.cpp: In function 'int main()': main.cpp:21:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if('a'<=s[j]&&s[j]<='z' || 'A'<=s[j]&&s[j]<='Z'){ ~~~~~~~~~^~~~~~~~~~~ main.cpp:23:28: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while('a'<=s[j]&&s[j]<='z' || 'A'<=s[j]&&s[j]<='Z'){ ~~~~~~~~~^~~~~~~~~~~ main.cpp:28:22: warning: statement has no effect [-Wunused-value] a[t][M+1]=='\0'; ~~~~~~~~~^~~~~~