>52
ｵﾏｴﾓﾅｰ
a = b = c = NULL;
try {
a = new char[1024];
b = new char[1024];
c = new char[1024];
} catch (bad_alloc e) {
if(a)delete[] a;
if(b)delete[] b;
if(c)delete[] c;
return 0;
}