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【函数用法】
接收一个字符串并输出（可含空格）。
【参数详解】
1.cin.getline()函数的完整形式有三个参数：cin.getline(字符数组名,字符个数,结束标志)
注意：若指定参数“字符个数”为n，则利用cout函数输出时只显示字符数组中的前n-1个字符。
原因：字符数组的第n个字符是不可见字符'\0'
2.当第三个参数省略时，系统默认为'\0'
3.简单实例：
· cin.getline(str,8,'m')，当输入abcdefghijklmn时,输出abcdefg，因为第8位是不可见字符'\0'
· cin.getline(str,8,'e')，当输入abcdefghijklmn时,输出abcd
【示例代码】
#include <bits/stdc++.h> using namespace std; const int maxn=100; char
c[maxn]; int main(){ cin.getline(c,8,'e'); //abcdefghijklmn cout<<c<<endl;
//abcd return 0; } /* in: abcdefghijklmn out: abcd */
