🚩 | 问题

假设有一个字符串aabcad，请写一段程序，去掉字符串中不相邻的重复字符串，即上述字符串处理之后的输出结果为：aabcd

📌 | 解答

  NSMutableString * str = [[NSMutableString alloc]initWithFormat;@“aabcad”];
for (int i = 0 ,i < str.length - 1 ;i++){
    unsigned char a = [str characterAtIndex:i];
    for (int j = i + 1 ,j < str.length ,j++){
        unsigned char b = [str characterAtIndex:j];
        if (a == b ){
            if (j == i + 1){
                }else{
                [str deleteCharactersInRange:NSMakeRange(j, 1)];
                }
            }
        }
    }
NSLog(@“%@”,str);