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64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
#include <stdio.h>
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typedef struct {
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int usn;
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char name[25];
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int m1,m2,m3;
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}
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STD;
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STD s;
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void display(FILE *);
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int search(FILE *,int);
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void main() {
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int i,n,usn_key,opn;
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FILE *fp;
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printf(" How many Records ? ");
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scanf("%d",&n);
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fp=fopen("stud.dat","w");
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for (i=0;i<n;i++) {
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printf("Read the Info for Student: %d (usn,name,m1,m2,m3) \n",i+1);
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scanf("%d%s%d%d%d",&s.usn,s.name,&s.m1,&s.m2,&s.m3);
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fwrite(&s,sizeof(s),1,fp);
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}
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fclose(fp);
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fp=fopen("stud.dat","r");
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do {
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printf("Press 1- Display\t 2- Search\t 3- Exit\t Your Option?");
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scanf("%d",&opn);
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switch(opn) {
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case 1: printf("\n Student Records in the File \n");
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display(fp);
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break;
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case 2: printf(" Read the USN of the student to be searched ?");
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scanf("%d",&usn_key);
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if(search(fp,usn_key)) {
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printf("Success ! Record found in the file\n");
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printf("%d\t%s\t%d\t%d\t%d\n",s.usn,s.name,s.m1,s.m2,s.m3);
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} else
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printf(" Failure!! Record with USN %d not found\n",usn_key);
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break;
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case 3: printf(" Exit!! Press a key . . .");
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getch();
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break;
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default: printf(" Invalid Option!!! Try again !!!\n");
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break;
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}
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}
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while(opn != 3);
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fclose(fp);
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}
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/* End of main() */
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void display(FILE *fp) {
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rewind(fp);
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while(fread(&s,sizeof(s),1,fp))
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printf("%d\t%s\t%d\t%d\t%d\n",s.usn,s.name,s.m1,s.m2,s.m3);
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}
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int search(FILE *fp, int usn_key) {
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rewind(fp);
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while(fread(&s,sizeof(s),1,fp))
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if( s.usn == usn_key) return 1;
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return 0;
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}
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