C 字符串反转

• 指针反转

void indicator_resver(char *cha)
{
    // 指向第一个字符
    char *begin = cha;
    // 指向最后一个字符
    char *end = cha + (strlen(cha) - 1);
    
    while (begin < end) {
        char temp = *begin;
        *begin = *end;
        *end = temp;
        ++begin;
        --end;
    }
}

char greet[] = "Hello,World";
indicator_resver(greet);

• 数组字符串反转

void array_resver(char *cha)
{
    char *s = cha;
    NSInteger length = strlen(s);
    for (NSInteger i = 0 , j = length - 1; i < j; i++ ,j--) {
        char temp = s[i];
        s[i] = s[j];
        s[j] = temp;
    }
}

char greet[] = "Hello,World";
array_resver(greet);