appending text to existing text file
Hi team,
This is doing my head in...and I'm sure i'm SO close to solving this! I need some guided help on how I can modify my code below, so that I can append some additional text to the beginning of a text file, which already has content within it.
Code:
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
char str[80] = "This is just some random text.\n";
FILE *fp;
char *p;
int i;
/* open file3.txt for output */
if((fp = fopen("file3.txt", "w"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
/* write str to disk */
p = str;
while(*p) {
if(fputc(*p, fp)==EOF) {
printf("Error writing file.\n");
exit(1);
}
p++;
}
fclose(fp);
/* open file3.txt for input */
if((fp = fopen("file3.txt", "r"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
/* read back the file */
for(;;) {
i = fgetc(fp);
if(i == EOF) break;
putchar(i);
}
fclose(fp);
return 0;
}
Basically, what this overwrites the contents of the file and just adds "This is just some random text."...
Would REALLY welcome any of you to show me the proper code!
Cheers,
K
