l10.c

ALL LINUX LAB PROGRAM MIT MANIPAL 2008-09 BATCH

#include<stdio.h>
#include<fcntl.h>
typedef struct
{
	int roll;
	char name[20];
	char br[10];
	int sem;
	int marks;
}stu;
main()
{
	stu s[20];
	FILE *fd,fd1;
	int i=0,n,j=0,no,k=0;
	char ch;
	do
	{
		printf("1.create");
		printf("\n2.Insert");
		printf("\n3.Delete");
		printf("\n4.Search");
		printf("\n5.Display");
		printf("\nEnter ur choice ");
		scanf("%d",&n);
		switch(n)
		{
			case 1: fd=fopen("stud","w");
				if(fd==NULL)
				   printf("File not created");
				break;
			case 2: printf("Enter Roll No ");
				scanf("%d",&s[i].roll);
				printf("Enter name ");
				scanf("%s",s[i].name);
				printf("Enter branch");
				scanf("%s",s[i].br);
				printf("Enter sem ");
				scanf("%d",&s[i].sem);
				printf("Enter marks ");
				scanf("%d",&s[i].marks);
				fwrite(&s[i],sizeof(stu),1,fd);
				i++;
				break;
			case 3: printf("Enter the roll no ");
				scanf("%d",&no);
				//k=0;
				fd1=fopen("stud1","w");
				for(j=0;j<=i;j++)
				{
					if((s[j].roll)!=no)
					{
						fread(&s[j],sizeof(stu),1,fd);
						fwrite(&s[j],sizeof(stu),1,fd1);
					}
				}
				system("mv stud1 stud");
				break;
			case 4: printf("Enter the roll no ");
				scanf("%d",&no);
				for(j=0;j<=i;j++)
				{
				   if(s[j].roll==no)
				      printf("%d %s %s %d %d",s[j].roll,s[j].name,s[j].br,s[j].sem,s[j].marks);
}
break;
			case 5: rewind(fd);
				for(j=0;j<=i;j++)
				{
				    fread(&s[j],sizeof(stu),1,fd);
				    printf("%d %s %s %d %d",s[j].roll,s[j].name,s[j].br,s[j].sem,s[j].marks);
}
break;	
		}
		printf("Do u wanna con... ");
		scanf(" %c",&ch);
	}while(ch=='y');
}