int a = 1; int b = 1; if(a != b) a = b; else a = b = 0;
switch(ch){ case 'a': cout << 0 << endl; break; case 'b': cout << 1 << endl; break; case 'c': cout << 2 << endl; break; }
(1)
(1)(2)
(2)
无
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