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resize函数的作用「建议收藏」
2022-07-25 20:53:00 【全栈程序员站长】
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resize函数作用:修改有效字符个数
resize(n) 如果有效字符的个数增加,则新增的位置填充‘\0’
resize(n,ch) 如果有效的字符的个数增加,则新增的位置填充ch
如果size减小,如下图。
resize改变的是有效元素个数,当调整之后的size大于容量时,容量会发生变化。 reserve修改容量,不会影响size。 clear只影响有效元素个数size
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