Example:
Three files
hi.txt
Inside of txt: "May we be"
again.txt
Inside of txt: "The ones who once"
final.txt
Inside of txt: "knew C"
And then, another file called "order"
order.txt
Inside of txt:
" hi.txt;6 "
" again.txt;7 "
" final.txt;3 "
What I want: read the first file name, open it, list the content, wait 6 seconds, read the second name, open it, list the content, wait 7 seconds, read the third name, open it, list the content, wait 3 seconds.
If I do it without opening the content (you'll see a second while on my code) and list the names, it works, yet for some reason it doesn't when it's about the content.
orderFile = fopen("order.txt","r");
while(fscanf(orderFile,"%49[^;];%d",fileName,&seconds) == 2)
{
contentFile = fopen(fileName,"r");
while(fscanf(contentFile,"%[^\t]",textContent) == 1)
{
printf("%s\n", textContent);
}
sleep(seconds);
fclose(contentFile);
}
fclose(orderFile);
Output:
May we be
(Waits 7 seconds)
Program closes with "RUN SUCCESSFUL"
EDIT@
It works now, as you guys said, this was the problem:
Old:
while(fscanf(orderFile,"%49[^;];%d",fileName,&seconds) == 2)
New:
while(fscanf(orderFile," %49[^;];%d",fileName,&seconds) == 2)
I'm having a "hard" time to completely understand it, what does the space does? doesn't accept enters? spaces? What exactly is it?
Don't use fscanf
for that
int
main()
{
FILE *orderFile = fopen("order.txt", "r");
if (orderFile != NULL)
{
int seconds;
char line[128];
/*
* fgets, read sizeof line characters or unitl '\n' is encountered
* this will read one line if it has less than sizeof line characters
*/
while (fgets(line, sizeof line, orderFile) != NULL)
{
/*
* size_t is usually unsigned long int, and is a type used
* by some standard functions.
*/
size_t fileSize;
char *fileContent;
FILE *contentFile;
char fileName[50];
/* parse the readline with scanf, extract fileName and seconds */
if (sscanf(line, "%49[^;];%d", fileName, &seconds) != 2)
continue;
/* try opening the file */
contentFile = fopen(fileName,"r");
if (contentFile == NULL)
continue;
/* seek to the end of the file */
fseek(contentFile, 0, SEEK_END);
/*
* get current position in the stream,
* it's the file size, since we are at the end of it
*/
fileSize = ftell(contentFile);
/* seek back to the begining of the stream */
rewind(contentFile);
/*
* request space in memory to store the file's content
* if the file turns out to be too large, this call will
* fail, and you will need a different approach.
*
* Like reading smaller portions of the file in a loop.
*/
fileContent = malloc(1 + fileSize);
/* check if the system gave us space */
if (fileContent != NULL)
{
size_t readSize;
/* read the whole content from the file */
readSize = fread(fileContent, 1, fileSize, contentFile);
/* add a null terminator to the string */
fileContent[readSize] = '\0';
/* show the contents */
printf("%s\n", fileContent);
/* release the memory back to the system */
free(fileContent);
}
sleep(seconds);
fclose(contentFile);
}
fclose(orderFile);
}
return 0;
}
Everything is barely explained in the code, read the manuals if you need more information.
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