01  #include<stdio.h>
02  
03  int main()
04  {
05   char name[20];
06   int id;
07   float cgpa;
08  
09   FILE *fp;   // file pointer
10  
11   printf("Enter your Details :");
12   gets(name);
13   scanf("%d %f",&id,&cgpa);
14  
15   fp=fopen("c:\student.txt","w");  //open a file for writing (file_path,mode)
16  
17   fprintf(fp,"%s %d %f",name,id,cgpa);
18  
19   fclose(fp);  //closing a file
20  
21  
22   fp=fopen("c:\student.txt","r");  //open a file for reading (file_path,mode)
23  
24   fscanf(fp,"%s %d %f",name,&id,&cgpa);
25  
26   fclose(fp);          // closing the file
27  
28   printf("Name : %snID : %dnCGPA : %f",name,id,cgpa);
29  
30   return 0;
31  }

 
 OUTPUT :
 
 Enter your Details :
 Amit
 1231
 8.7
 
 Name : Amit
 ID : 1231
 CGPA : 8.700000