Eroare de compilare: user.cpp:14:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:21:31: error: ‘strlen’ was not declared in this scope for(int i=0;i<strlen(t);i++) ^ user.cpp:25:32: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(t[i]>='a'&&t[i]<='z'||t[i]>='A'&&t[i]<='Z'){i++;ok=1;} ^