能解释一上吗?\\\\是什么意思 strcat(pathname, "\\\\Desktop\\\\7.txt")

能解释一下吗?\\\\是什么意思 strcat(pathname, "\\\\Desktop\\\\7.txt");
strcat(pathname, "\\\\Desktop\\\\7.txt");

------解决方案--------------------
探讨

\\字符‘\’需要转义"\\\\Desktop\\\\7.txt" --> \\Desktop\\7.txt

------解决方案--------------------
google 转义字符