wrdhold is a 2d char array, I get a seg fault trying to write it to a file.Code:void printtofile(char **wrdhold, char *out) { printf("%s\n", wrdhold[5]); FILE *f_out=fopen(out, "w"); if(f_out==NULL) { printf("Error: can't create file for writing.\n"); } fprintf(f_out, "%c", wrdhold[0]); fclose(f_out); }
Am I not allowed to use 2d arrays for fprintf?
opps,
should be %s...but still get same error.
How does the caller declare the parameter you receive as wrdhold ?
How does the caller initialise it?
The problem is entirely with the caller. If they pass a garbage pointer, then this is where it fails.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
if you fail to open file - you still using the nul-pointer in fprintf and fclose
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
I've done this with your function and is working just fine:
First of all wrdhold is a pointer to a pointer to a char... maybe this is your pb.. maybe your not using it like that or maybe u don't initialized your wrdhold so that your passing garbage data.Code:#include <stdio.h> void printtofile(char **wrdhold, char *out) { printf("%s\n", wrdhold[5]); FILE *f_out=fopen(out, "w"); if(f_out==NULL) { printf("Error: can't create file for writing.\n"); } fprintf(f_out, "%s", wrdhold[0]); fclose(f_out); } int main() { char *wrdhold[10], *out = "text.txt"; wrdhold[0] = "ana"; wrdhold[5] = "ddsd"; printtofile(wrdhold, out); return 0; }
I have stopped reading Stephen King novels. Now I just read C code instead.
