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。
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。
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 |
101845 | 2022211354 | asdf | Accepted | 1192KB | 12ms | C | 1160 bytes | 2023-05-04 11:54:31 | |
101841 | 2022211354 | asdf | Presentation Error | 1192KB | 11ms | C | 1136 bytes | 2023-05-04 11:46:24 | |
101838 | 2022211354 | asdf | Wrong Answer | 1192KB | 14ms | C | 1221 bytes | 2023-05-04 11:36:19 | |
101834 | 2022211354 | asdf | Presentation Error | 1192KB | 10ms | C | 1121 bytes | 2023-05-04 11:28:26 | |
101831 | 2022211354 | asdf | Accepted | 1192KB | 13ms | C | 1482 bytes | 2023-05-04 11:26:15 | |
101830 | 2022211354 | asdf | Runtime Error | 1196KB | 13ms | C | 1480 bytes | 2023-05-04 11:23:24 | |
101821 | 2022211354 | asdf | Accepted | 1068KB | 9ms | C | 809 bytes | 2023-05-04 11:09:22 | |
101616 | 2022211354 | asdf | Presentation Error | 1192KB | 14ms | C | 1103 bytes | 2023-05-03 21:48:18 | |
101605 | 2022211354 | asdf | Wrong Answer | 1192KB | 12ms | C | 1075 bytes | 2023-05-03 21:38:28 | |
101445 | 2022211354 | asdf | Accepted | 1196KB | 10ms | C | 1796 bytes | 2023-05-03 18:57:16 | |
101440 | 2022211354 | asdf | *Accepted65089 | 1196KB | 12ms | C | 1863 bytes | 2023-05-03 18:55:04 | |
101419 | 2022211354 | asdf | Wrong Answer | 1196KB | 9ms | C | 1778 bytes | 2023-05-03 18:35:05 | |
101405 | 2022211354 | asdf | Runtime Error | 1196KB | 14ms | C | 1483 bytes | 2023-05-03 18:23:25 | |
101394 | 2022211354 | asdf | Runtime Error | 1196KB | 13ms | C | 1488 bytes | 2023-05-03 18:04:32 | |
101324 | 2022211354 | asdf | Wrong Answer | 1192KB | 12ms | C | 986 bytes | 2023-05-03 16:41:22 | |
101165 | 2022211354 | asdf | Wrong Answer | 1196KB | 9ms | C | 1561 bytes | 2023-05-03 11:34:42 | |
91693 | 2022211354 | asdf | Runtime Error | 1192KB | 6ms | C | 1475 bytes | 2023-04-20 18:21:28 | |
91690 | 2022211354 | asdf | Runtime Error | 1196KB | 12ms | C | 1471 bytes | 2023-04-20 18:20:25 | |
91688 | 2022211354 | asdf | Runtime Error | 1192KB | 5ms | C | 1471 bytes | 2023-04-20 18:19:39 | |
91685 | 2022211354 | asdf | Runtime Error | 1192KB | 4ms | C | 1466 bytes | 2023-04-20 18:17:17 | |
91683 | 2022211354 | asdf | Runtime Error | 1196KB | 12ms | C | 1466 bytes | 2023-04-20 18:16:29 | |
91679 | 2022211354 | asdf | Runtime Error | 1192KB | 4ms | C | 1360 bytes | 2023-04-20 18:07:28 |