文件操作练习。注意B题的读取不能用struct。
D和谐词汇的题,输入是若干字符串,不以空行结束. 所以 gets(line); while (line[0]){... gets(line);}就会导致时间超限,代码在等空行,但in数据没有。应改为while(gets(line))。
/*文件练习B题. 读取一个包含7类数据的二进制文件,找到指定部分内容,并正确解释输出。
思路分析:主体框架是读取二进制文件, while (fread(buffer, buffLen, 1, infile) > 0){...}
因为二进制文件的记录长度是固定的,所以可以计算每条记录的长度,使用fseek直接定位到指定段;
所以用fseek的话,实际只需要读一次就可以。
但是这道题的特殊之处在于,一条记录内是顺序包含7种类型数据,是分多次写入,因此带来的麻烦是
虽然每段内容结构相同,但不能用struct进行整块读取。
因为struct的成员之间有内存空隙;除非源文件本身是用struct格式写入才行。
经测试,struct {含7种变量和数组}的长度为200, 但实际7种变量和数组的总长要小一些.
因此,可以直接定位,但必须分别读取,写出的代码冗长,且容易在变量名和输出格式上出错。
一种办法是:按总长度整块读取到字节数组中,然后再逐个定义对应类型的指针,按间接访问就可格式化解释输出。
例: char buffer[LEN];
int i=0; printf("%c\n", buffer[i]); i++;
short * hdPtr=&buffer[i]; printf("%hd\n", *hdPtr); i+=sizeof(short);
*/
RunID | User | Nick Name | Problem ID | Result | Memory | Time | Language | Code Length | Submit Time |
87542 | 2022213782 | indication | Accepted | 1200KB | 11ms | C | 1392 bytes | 2023-04-12 14:05:25 | |
87533 | 2022213782 | indication | Wrong Answer | 1200KB | 10ms | C | 1323 bytes | 2023-04-12 13:50:38 | |
83031 | 2022213782 | indication | Accepted | 1192KB | 10ms | C | 1380 bytes | 2023-04-05 18:05:22 | |
83025 | 2022213782 | indication | Wrong Answer | 1192KB | 10ms | C | 1387 bytes | 2023-04-05 17:54:58 | |
83008 | 2022213782 | indication | Wrong Answer | 1192KB | 11ms | C | 1433 bytes | 2023-04-05 17:40:26 | |
82968 | 2022213782 | indication | Accepted | 1068KB | 10ms | C | 1262 bytes | 2023-04-05 17:11:47 | |
82910 | 2022213782 | indication | Accepted | 1068KB | 12ms | C | 1195 bytes | 2023-04-05 16:53:36 | |
80896 | 2022213782 | indication | Accepted | 1192KB | 10ms | C | 1474 bytes | 2023-04-03 22:06:00 | |
80892 | 2022213782 | indication | Wrong Answer | 1192KB | 9ms | C | 1473 bytes | 2023-04-03 22:04:56 | |
80890 | 2022213782 | indication | Wrong Answer | 1192KB | 12ms | C | 1475 bytes | 2023-04-03 22:04:37 | |
80885 | 2022213782 | indication | Wrong Answer | 1192KB | 11ms | C | 1472 bytes | 2023-04-03 22:03:09 | |
80882 | 2022213782 | indication | Wrong Answer | 1192KB | 9ms | C | 1473 bytes | 2023-04-03 22:02:13 | |
80880 | 2022213782 | indication | Wrong Answer | 1192KB | 8ms | C | 1475 bytes | 2023-04-03 22:01:42 | |
80872 | 2022213782 | indication | Wrong Answer | 1192KB | 10ms | C | 1473 bytes | 2023-04-03 21:59:11 | |
80866 | 2022213782 | indication | Wrong Answer | 1192KB | 10ms | C | 1468 bytes | 2023-04-03 21:57:43 | |
80864 | 2022213782 | indication | Wrong Answer | 1192KB | 12ms | C | 1466 bytes | 2023-04-03 21:57:03 | |
80855 | 2022213782 | indication | Wrong Answer | 1192KB | 8ms | C | 1414 bytes | 2023-04-03 21:53:30 | |
80847 | 2022213782 | indication | Wrong Answer | 1192KB | 13ms | C | 1416 bytes | 2023-04-03 21:50:35 | |
80840 | 2022213782 | indication | Runtime Error | 1192KB | 6ms | C | 1399 bytes | 2023-04-03 21:49:01 |