单项选择题
下面程序输出结果是__________。int main(void){ int a = 0 , b = 1, c = 0 ,d = 20 , x =100; if(a) x = d-10; else if(!b) if(!c) x = 15; else x = 20; printf(“%d”, x); return 0;
A.25B.100
C.20
D.15
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