我正在尝试编写一个比较两个文件内容的函数.
我希望它在文件相同时返回1,如果不同则返回0.
ch1并ch2作为缓冲区,我曾经fgets获取我的文件的内容.
我认为eof指针有问题,但我不确定.FILE变量在命令行中给出.
PS它适用于大小低于64KB的小文件,但不适用于较大的文件(例如700MB电影,或5MB的.mp3文件).
任何想法,如何解决？
int compareFile(FILE* file_compared, FILE* file_checked)
{
bool diff = 0;
int N = 65536;
char* b1 = (char*) calloc (1, N+1);
char* b2 = (char*) calloc (1, N+1);
size_t s1, s2;
do {
s1 = fread(b1, 1, N, file_compared);
s2 = fread(b2, 1, N, file_checked);
if (s1 != s2 || memcmp(b1, b2, s1)) {
diff = 1;
break;
}
} while (!feof(file_compared) || !feof(file_checked));
free(b1); …我试图理解这段代码的用途,但我无法理解.你能解释一下吗？
co_to(I, I, [I]).
co_to(I, L, [I|L]) :- I < K, I1 is I + 1, co_to(I1, K, L).
我有以下代码:
#include <stdio.h> // For printf()
#include <sys/stat.h> // For struct stat and stat()
struct stat stResult;
if(stat("Filename.txt", &stResult) == 0)
{
// We have File Attributes
// stResult.st_size is the size in bytes (I believe)
// It also contains some other information you can lookup if you feel like it
printf("Filesize: %i", stResult.st_size);
}
else
{
// We couldn't open the file
printf("Couldn't get file attributes...");
}
现在.如何通过stat()传递我自己的字符串？像这样
string myStr = "MyFile.txt";
stat(myStr, &stResult)