I am trying to get a structure written as output into a text file stored in the same directory as the executable. I have added the compiler error mes

#include <stdio.h>

struct ticket
{
    int trainnum;
    char trainname[30];
    char doj[11];
    char sex;
    unsigned int age;    
    unsigned int fare;
};

void out(struct ticket *t)
{
    FILE *text;
    text = fopen("ticket.txt", "w");
    
    fprintf("Train No. : %d\n", t -> trainnum);
    fprintf("Train Name : %s\n", t -> trainname);
    fprintf("Date of Journey : %s\n", t -> doj);
    fprintf("Sex : %c\n", t -> sex);
    fprintf("Age : %d\n", t -> age);
    fprintf("Fare : %d", t -> fare);
    
    fclose(text);

}


int main()
{
    struct ticket t1;
    
    printf("Train No. :");
    scanf("%d", &t1.trainnum);
    printf("Train Name :");
    gets(t1.trainname);
    printf("Date of Journey (dd/mm/yyyy) :");
    gets(t1.doj);
    printf("Sex :");
    scanf(" %c", &t1.sex);
    printf("Age :");
    scanf("%d", &t1.age);
    printf("Fare :");
    scanf("%d", &t1.fare);
    
    
    out(&t1);
    
    return 0;
}

/*

E:\pd\project\writing to file\dev.cpp    In function 'void out(ticket*)':
18    43    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
19    45    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
20    44    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
21    32    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
22    32    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
23    32    E:\pd\project\writing to file\dev.cpp    [Error] cannot convert 'const char*' to 'FILE* {aka _iobuf*}' for argument '1' to 'int fprintf(FILE*, const char*, ...)'
 

*/

/*

I have no idea what the error messages mean, so it would be really helpful if someone explains what the problem is, and what a possible solution to it might be.

*/

Answers

•   
  

  You were just missing the filename in the syntax of fscanf. It is done on the code below:

  #include <stdio.h>
  
  struct ticket
  {
      int trainnum;
      char trainname[30];
      char doj[11];
      char sex;
      unsigned int age;    
      unsigned int fare;
  };
  
  void out(struct ticket *t)
  {
      FILE *text;
      text = fopen("ticket.txt", "w");
      
      fprintf(text,"Train No. : %d\n", t -> trainnum);
      fprintf(text,"Train Name : %s\n", t -> trainname);
      fprintf(text,"Date of Journey : %s\n", t -> doj);
      fprintf(text,"Sex : %c\n", t -> sex);
      fprintf(text,"Age : %d\n", t -> age);
      fprintf(text,"Fare : %d", t -> fare);
      
      fclose(text);
  
  }
  
  
  int main()
  {
      struct ticket t1;
      
      printf("Train No. :");
      scanf("%d", &t1.trainnum);
      printf("Train Name :");
      //Taking extra character
      getchar();
      gets(t1.trainname);
      printf("Date of Journey (dd/mm/yyyy) :");
      gets(t1.doj);
      printf("Sex :");
      scanf(" %c", &t1.sex);
      printf("Age :");
      scanf("%d", &t1.age);
      printf("Fare :");
      scanf("%d", &t1.fare);
      
      
      out(&t1);
      
      return 0;
  }
  

   

  
  

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•   
  

  #include<stdio.h>
  typedef struct student
  {
          int rno;
          char name[100];
          int age;
  }st;
  void fun(st s)
  {
          FILE *fp;
          fp=fopen("data","w");
          fprintf(fp,"%d",s.rno);
          fprintf(fp,"%s",s.name);
          fprintf(fp,"%d",s.age);
  }
  
  
  

  main()
  {
          st s1;
          printf("enter the roll number\n");
          scanf("%d",&s1.rno);
          printf("enter the name\n");
          scanf("%s",s1.name);
          printf("enter the age\n");
          scanf("%d",&s1.age);
          fun(s1);
  }

   

  
  

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