filename[size] != '\\' && size > 0
时间: 2024-05-27 15:14:13 浏览: 11
This is a boolean expression that checks if the last character of the filename string is not a backslash character ('\'). The backslash character is often used as a path separator in file systems. Therefore, this expression could be used to ensure that the given filename does not end with a backslash, which could cause errors in file operations or path manipulation.
相关问题
while (filename[size] != '\\' && size > 0) 语句的意思
&& filename[size] != '/'
&& size > 0){
size--;
}
if (size == 0){
return "";
}
else{
return filename.substr(size+1);
}
This code snippet takes a filename as input and returns only the file name (without any directory path). It does this by iterating through the characters in the filename from the end towards the beginning, searching for the last occurrence of either a backslash (\) or a forward slash (/) character. Once it finds this character, it returns the substring of the filename starting from the character immediately after the slash, which represents only the file name.
For example, if the input filename is "C:\Users\JohnDoe\Documents\example.txt", the function will return "example.txt".
void find(char* obj,int &flag) { for (int i = 2; i < MSD + 2; i++) { //如果是有效文件,则检查是否有目标内容 if (curDir->directItem[i].firstDisk != -1&&curDir->directItem[i].type == 0&&curDir->directItem[i].size!=0&& strcmp(curDir->directItem[i].fileName,"")!=0) { char* buf = new char[MAX_FILE_SIZE]; string newStr[2]; newStr[0] = "more"; newStr[1] = curDir->directItem[i].fileName; read(newStr, buf); if (strstr(buf, obj) != NULL) { cout <<"# "<< curPath << newStr[1] << "中有目标内容!" << endl; flag = 1; } delete[] buf; } //如果是目录,则递归查找子目录下文件内容 if(curDir->directItem[i].firstDisk != -1 && curDir->directItem[i].type == 1&&strcmp(curDir->directItem[i].fileName, "") != 0) { string dir = curDir->directItem[i].fileName; direct* cur = curDir; string oldPath = curPath; curDir = (direct*)(fdisk + curDir->directItem[i].next * DISK_SIZE); curPath = curPath + dir + "\\"; find(obj,flag); curPath = oldPath; curDir = cur; } } }代码解释
这段代码是一个递归函数,用于在当前目录及其子目录下查找包含特定内容的文件。
函数接受两个参数:一个指向要查找的内容的 char 指针,另一个是一个引用变量,用于标记是否找到目标内容。
在函数中,循环遍历当前目录下的所有文件和子目录。对于每个文件,如果它是一个有效的文件(即不是空文件,且文件名不为空),则读取其内容,并检查其是否包含目标内容。如果找到目标内容,则将标记变量设为 1。
对于每个子目录,递归调用函数,以在该子目录下查找目标内容。在递归调用之前,保存当前目录和路径信息,以便在递归调用结束后返回到原始目录。
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