Hello all,
I keep getting a segmentation fault when I run this compiled program.
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "person.h"
/* write a struct to the file */
void WritePersonFixedLength(struct person * input, FILE * target)
{
//use fprintf to write input->firstname '%-20s'
fprintf(target, "%-20s", input->firstname);
//use fprintf to write input->middlename '%-20s'
fprintf(target, "%-20s", input->middlename);
//use fprintf to write input->lastname '%-20s'
fprintf(target, "%-20s", input->lastname);
//use fprintf to write input->age '%8d'
fprintf(target, "%8d", input->age);
/* add a newline to the file so that it is a whole lot more readable,
we need to remember to skip this when we read it out */
fprintf(target, "\n");
}
int main()
{
struct person person1,person2,person3,person4,person5;
/* create a FILE pointer myfile */
FILE * myfile;
strcpy(person1.firstname,"Bartholomew");
strcpy(person1.middlename,"");
strcpy(person1.lastname,"Simpson");
person1.age=10;
strcpy(person2.firstname,"Homer");
strcpy(person2.middlename,"Jay");
strcpy(person2.lastname,"Simpson");
person2.age=36;
strcpy(person3.firstname,"Lisa");
strcpy(person3.middlename,"");
strcpy(person3.lastname,"Simpson");
person3.age=8;
strcpy(person4.firstname,"Marjorie");
strcpy(person4.middlename,"");
strcpy(person4.lastname,"Simpson");
person4.age=34;
strcpy(person5.firstname,"Margaret");
strcpy(person5.middlename,"");
strcpy(person5.lastname,"Simpson");
person5.age=1;
/* use fopen to open the file data.dat in
WRITE mode and set the pointer myfile */
myfile = fopen("data.txt","w");
/* if the fopen operation was not successful print a message saying
the file couldn't be opened then quit the program 'exit(1);' */
if (myfile = NULL)
{
printf("the file couldn't be opened");
exit(1);
}
printf("\n\nWrite the 5 structs to file\n\n");
WritePersonFixedLength(&person1, myfile);
WritePersonFixedLength(&person2, myfile);
WritePersonFixedLength(&person3, myfile);
WritePersonFixedLength(&person4, myfile);
WritePersonFixedLength(&person5, myfile);
/* use close to close the File pointer myfile */
fclose(myfile);
}this is the header file "person.h" that goes with the above program
#include <stdio.h>
#include <string.h>
struct person
{
char firstname[20];
char middlename[20];
char lastname[20];
int age;
};
void PrintPerson( struct person input)
{
printf("First Name: %s\n", input.firstname);
printf("Middle Name: %s\n",input.middlename);
printf("Last Name: %s\n", input.lastname);
printf("Age: %d\n\n",input.age);
}anyone have any ideas as to why I keep getting a segmentation fault?
