Reading a text file to a simple structure in C

Asked Nov 06 '17 at 19:38

Active Mar 09 '21 at 16:41

Viewed 51 times

I have the following structure:

  struct dados{
    int triage;
    int doctors;
    int shift;
    int mq_max;
}data;

and am trying to read in the file config.txt which is composed of:

TRIAGE=5DOCTORS=10SHIFT_LENGTH=5MQ_MAX=20

In the following manner:

int main{
    FILE *fp = fopen("config.txt","r");
    fscanf(fp,"TRIAGE=%dDOCTORS=%dSHIFT_LENGTH=%dMQ_MAX=%d",&data.triage,&data.doctors,&data.shift,&data.mq_max);
 return 0;
}

but all it does is print memory addresses, and obviously I need the values next to the =.

edited Mar 09 '21 at 16:41

Jason Aller

3,541
28
38
38

asked Nov 06 '17 at 19:38

NUGA

1

you dont need the mallocs – pm100 Nov 06 '17 at 19:40
2

and this code doesnt print anything. please show running code – pm100 Nov 06 '17 at 19:41
1

and check the return value of fscanf and fopen – pm100 Nov 06 '17 at 19:42
@pm100 fopen returns 0 and scanf returns -1 – NUGA Nov 06 '17 at 19:44
1

fopen retruning 0 says it failed to open the file, do perror after the failure – pm100 Nov 06 '17 at 19:46
@pm100 but why is it failing to open? I have the txt file in the same folder where main.c is – NUGA Nov 06 '17 at 19:51
The folder where your program is may not be the current working directory. [Previous question](https://stackoverflow.com/questions/1746510/unable-to-open-a-file-with-fopen). – Weather Vane Nov 06 '17 at 20:00
Nevermind it was just a prank broooo. – NUGA Nov 06 '17 at 20:12
What do you mean? Are you a time waster? – Weather Vane Nov 06 '17 at 20:17
I'm voting to close this question as off-topic because the OP wrote in comments that it was "a prank". There is someone who knows C quite well and keeps making a new account and asking tricky questions which are not real, for some motive known only to that person. – Weather Vane Nov 06 '17 at 20:25

Reading a text file to a simple structure in C

0 Answers0