Could someone please explain error here in file handling - file-handling

Question

I am writing a program which would store the student record in file named 'new' on desktop.
If there is no file named 'new' then it should create it first, so I have used an if statement. I have also put the whole code in a do while loop, so it should loop though the code again and again. Inside the do while I have used switch
to write to file using fprintf
code still not written( will add read function to it later on)
To exit out of do while loop
but I am getting an error 'ch' undeclared (first use this fucntion)
How can I fix this program?
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
typedef struct
{
int *name;
int score;
}structure;
int main()
{
FILE *file= fopen("C://Users//Abhimanyu Aryan//Desktop//new.txt","r");
if(file==NULL)
{
FILE *file=fopen("C://Users//Abhimanyu Aryan//Desktop//new.txt","w");
}
//Loop through this
do
{
printf("\n1) Add record\n2) View Record\n3) Exit");
int ch;
printf("Enter your choice: ");
scanf("%i",&ch);
switch (ch)
{
//case 1 will include write access to file on pressing 1
case 1:
//name
printf("Enter name: ");
char name[30];
scanf("%c", name);
//score
printf("Enter score: ");
int score;
scanf("%i", &score);
//printing to file
fprintf(file, "%c\t%i", name, score);
break;
//case still not in use
case 2:
break;
//case to exit
case 3:
break;
}
}while(ch != 3);
fclose(file);
return 0;
}

Answer 1

ah... the problem may well be this line of code:
} while (ch != 3)
the ch variable is defined ONLY inside the do-while loop...
I'd try to define it outside the loop and see if that helped

Answer 2

You should initialize ch outside of do..while loop, that's the error