题目内容
有定义如下：struct info{char name[20];int age;};struct info class[6]={"Zhang",17,"Wang",19,"Mao",18,"liu",16};则，执行printf("%c\n",class[3].name);语句后，将输出字母M。
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以下代码定义结构体数组date,它共有10个元素，每一个元素的数据类型都是int型。struct{int year;int month;int day;}date[10];
If the production costs fall and the selling price remains the same, the profit margin will increase.
If the production costs fall and the selling price increases, the profit margin will increase.
If the production costs rise and the selling price remains the same, the profit margin will increase.
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