C Program for Array of Structures

Create a database using an array of structures and perform the following operations on it

1. Create 2. Add 3. Search 4. Update 5. Delete

#include<stdio.h>

#include<string.h>

#include<stdlib.h>

struct student

{

      int rno,marks,del;

      char name[20];

};

void create(int,struct student []);

void add(int,struct student []);

void display(int,struct student []);

void search(int,int,struct student []);

void update(int,int,struct student []);

void delet(int,int,struct student []);

 int main()

{

      setbuf(stdout, NULL);

      int n,value,choice;

      struct student s[10];

      setbuf(stdout, NULL);

      printf("\n\t\t**STUDENT DATABASE**\n");

      printf("\n\tEnter the number of students >");

      scanf("%d",&n);

      create(n,s);

      do

      {

      printf("\n\n----------------------------MENU----------------------------");

      printf("\n\t1:ADD\n\t2:Display\n\t3:Search\n\t4:Update\n\t5:Delete\n\t\n\n\tEnter your choice\t>>");

      scanf("%d",&choice);

      printf("------------------------------------------------------------  \n");

      switch(choice)

      {

      case 1:

            n=n+1;

            add(n,s);

            break;

      case 2:

            printf("\n\tRollNo\tNAME\tMARKS \n");

            display(n,s);

            break;

      case 3:

            printf("\n\tEnter the RollNo. to Search   >");

            scanf("%d",&value);

            search(n,value,s);

            break;

      case 4:

            printf("\n\tEnter the RollNo. to Update   >");

            scanf("%d",&value);

            update(n,value,s);

            break;

      case 5:

            printf("\n\tEnter the RollNo. to Delete   >");

            scanf("%d",&value);

            delet(n,value,s);

            break;

      }

      }while(choice!=0);

      printf("\n");

      return 0;

}

void create(int n,struct student s[10])

{

      int i,j;

      for (i=0;i<n;i++)

      {

      printf("\n\tEnter the RollNo. >>");

      scanf("%d",&s[i].rno);

      printf("\tEnter NAME  >>");

      scanf("%s",s[i].name);

      printf("\tEnter Marks  >>");

      scanf("%d",&s[i].marks);

      s[i].del=0;

      }

}

void add(int n,struct student s[10])

{

      int i,j;

      for (i=n-1;i<n;i++)

      {

      printf("\n\tEnter the RollNo. >>");

      scanf("%d",&s[i].rno);

      printf("\tEnter NAME  >>");

      scanf("%s",s[i].name);

      printf("\tEnter Marks  >>");

      scanf("%d",&s[i].marks);

      s[i].del=0;

      }    

}

void display(int n,struct student s[10])

{

      int i;

      for (i=0;i<n;i++)

      {

            if(s[i].del==0)

                  printf("\n\t%d\t%s\t%d",s[i].rno,s[i].name,s[i].marks);

      }

}

void search(int n,int value,struct student s[10])

{

      int i;

      for (i=0;i<n;i++)

      {

            if (value==s[i].rno)

            {

            printf("\n\tRollNo\tMARKS\tNAME ");

            printf("\n\t%d\t%s\t%d",s[i].rno,s[i].name,s[i].marks);

            break;

            }

      }

      if (i==n)

          printf("\n\tNO RECORD FOUND");

}

void update(int n,int value,struct student s[10])

{

      int i,j;

      for (i=0;i<n;i++)

      {

            if (value==s[i].rno)

            {

            printf("\n\tEnter the RollNo. & NAME & MARKS of student  \n\t");

            scanf("%d%s%d",&s[i].rno,s[i].name,&s[i].marks);

            break;

            }

      }

      if (i==n)

          printf("\n\tNO RECORD TO UPDATE ");  

}

void delet(int n,int value,struct student s[10])

{

      int i;

      for (i=0;i<n;i++)

      {

            if (value==s[i].rno)

            {

            printf("\n\t----------------------");

            printf("\n\tRollNo\tMARKS\tNAME ");

            printf("\n\t%d\t%s\t%d",s[i].rno,s[i].name,s[i].marks);

            printf("\n\t----------------------");

            printf("\n\tSure to delete: 1=YES/2=NO  >");

            scanf("%d",&s[i].del);

            break;

            }

      }

}

Output:

**STUDENT DATABASE** Enter the number of students >2 Enter the RollNo. >>1 Enter NAME  >>a Enter Marks  >>11 Enter the RollNo. >>2 Enter NAME  >>b Enter Marks  >>22
----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>1------------------------------------------------------------   Enter the RollNo. >>3 Enter NAME  >>c Enter Marks  >>33
----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>2------------------------------------------------------------   RollNo NAME MARKS  1 a 11 2 b 22 3 c 33----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>3------------------------------------------------------------   Enter the RollNo. to Search >2 RollNo MARKS NAME  2 b 22----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>4------------------------------------------------------------   Enter the RollNo. to Update >3 Enter the RollNo. & NAME & MARKS of student   3cc33
----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>2------------------------------------------------------------   RollNo NAME MARKS  1 a 11 2 b 22 3 cc 33----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>5------------------------------------------------------------   Enter the RollNo. to Delete >3 ---------------------- RollNo MARKS NAME  3 cc 33 ---------------------- Sure to delete: 1=YES/2=NO  >1
----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>2------------------------------------------------------------   RollNo NAME MARKS  1 a 11 2 b 22----------------------------MENU---------------------------- 1:ADD 2:Display 3:Search 4:Update 5:Delete Enter your choice >>