Question

C#返回字符串中指定索引的字符

string num = "saaa";返回字符串中的第二个字符int index = 1;char dd =

Answer 1

string就是char的数组，直接加索引就可以：

int index = 1;
char dd = num[index];

Answer 2

char dd = num[index];

Answer 3

char dd = num.charAt(index-1)

Answer 4

String ch=num.substring(2,3);