sprintf(pPCKPackage->p_no,"%s",szIndex); sprintf(pPCKPackage->p_card_flag,"%d",nCardFlag); sprintf(pPCKPackage->p_account_no,"%-32s",strAccount.c_str());//账号改成32位 sprintf(pPCKPackage->p_account_flag,"%s","0000000000000000");//账户属性标志
时间: 2024-02-01 12:12:20 浏览: 24
这段代码是使用 sprintf 函数将一些变量的值格式化后存储到一个结构体中。具体来说:
- `%s` 表示将字符串类型的变量按照字符串格式化后存储到结构体中。
- `%d` 表示将整数类型的变量按照十进制整数格式化后存储到结构体中。
- `%-32s` 表示将字符串类型的变量按照字符串格式化后存储到结构体中,并且左对齐,总宽度为32个字符,不足的地方用空格填充。
- `"0000000000000000"` 是一个字符串常量,表示账户属性标志的默认值。
具体的实现细节需要根据结构体的定义来确定。
相关问题
sprintf(rpackhead->r_recod_total,"%08s",sp[0]);
这行代码的作用是将字符串数组 `sp[0]` 中的内容格式化为 8 位的字符串,并存储到 `rpackhead->r_recod_total` 字符数组中。具体来说,`%08s` 是一个格式化字符串,其中 `%s` 表示将字符串以原样输出,`%08` 表示输出的字符串长度为 8 位,不足 8 位时左侧用零补齐。因此,这行代码的作用是将 `sp[0]` 中的内容转换为一个长度为 8 的字符串,并在左侧用零补齐,最终存储到 `rpackhead->r_recod_total` 中。注意,`rpackhead->r_recod_total` 必须是一个长度为 8 的字符数组,否则可能会发生内存越界的错误。
优化一下代码static void fill_file_chunk(const char *path, int *number, int level) { DIR *dir = NULL; struct dirent *entry = NULL; int i = 0; ++level; if(level > 3) return; dir = opendir(path); if(dir == NULL) return; while((entry = readdir(dir)) != NULL) { if(strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) continue; if(entry->d_type == 4 && level == 1){ if(check_dir_name(entry->d_name) == 0) continue; char buffer[MAX_PATH]; sprintf(buffer, "%s/%s", path, entry->d_name); fill_file_chunk(buffer, number, level); } if(entry->d_type == 4 && level == 2){ if(check_dir_name(entry->d_name) == 0) continue; char buffer[MAX_PATH]; sprintf(buffer, "%s/%s", path, entry->d_name); fill_file_chunk(buffer, number, level); } if(entry->d_type == 8 && level ==3){ if(check_file_name(entry->d_name) == 0) continue; if(*number == max_file_chunk){ file_chunks = (struct FileChunk *)realloc(file_chunks, (max_file_chunk + FILE_CHUNK_INCREAMENT) * sizeof(struct FileChunk)); if(file_chunks == NULL) break; max_file_chunk += FILE_CHUNK_INCREAMENT; } char buffer[MAX_PATH]; sprintf(buffer, "%s/%s", path, entry->d_name); i = *number; strcpy(file_chunks[i].file_name, entry->d_name); sprintf(file_chunks[i].file_path, buffer); file_chunks[i].file_size = get_file_size(buffer); *number = i + 1; } else continue; } closedir(dir); return; }
Here are some suggested optimizations for the given code:
1. Use switch case instead of if-else: In the current code, multiple if-else statements are being used to check for different conditions. This can be optimized by using switch case instead, which can improve readability and maintainability of the code.
2. Use early return to reduce nested if-else: In the current code, multiple if-else statements are nested inside a while loop, which can make the code difficult to read and understand. By using early return, we can reduce the level of nesting and make the code more readable.
3. Avoid redundant code: In the current code, there are multiple instances where the same block of code is being repeated. This can be optimized by refactoring the code and avoiding the duplication of code.
Here is the optimized code:
```
static void fill_file_chunk(const char *path, int *number, int level) {
DIR *dir = opendir(path);
if(dir == NULL) {
return;
}
++level;
if(level > 3) {
closedir(dir);
return;
}
struct dirent *entry;
while((entry = readdir(dir)) != NULL) {
switch(entry->d_type) {
case DT_DIR:
if(level == 1 || level == 2) {
if(check_dir_name(entry->d_name) == 0) {
continue;
}
char buffer[MAX_PATH];
sprintf(buffer, "%s/%s", path, entry->d_name);
fill_file_chunk(buffer, number, level);
}
break;
case DT_REG:
if(level == 3) {
if(check_file_name(entry->d_name) == 0) {
continue;
}
if(*number == max_file_chunk) {
file_chunks = (struct FileChunk *)realloc(file_chunks, (max_file_chunk + FILE_CHUNK_INCREAMENT) * sizeof(struct FileChunk));
if(file_chunks == NULL) {
break;
}
max_file_chunk += FILE_CHUNK_INCREAMENT;
}
char buffer[MAX_PATH];
sprintf(buffer, "%s/%s", path, entry->d_name);
int i = *number;
strcpy(file_chunks[i].file_name, entry->d_name);
sprintf(file_chunks[i].file_path, buffer);
file_chunks[i].file_size = get_file_size(buffer);
*number = i + 1;
}
break;
default:
break;
}
}
closedir(dir);
}
```
This optimized code uses switch case instead of if-else statements, reduces the level of nesting by using early return, and avoids redundant code by refactoring the code.