#include <stdio.h>

void clean_stdin(void){ int c; do { c = getchar(); } while (c != '\n' && c != EOF); }

struct student{ int roll, age; char name[50], gender; };

int main(){

struct student s[10], temporary;

int i, choice, numberOfStudents, pos,rollNumberToSearch, flag;

Menu:

printf("1. Creation \n2. Insertion\n3. Deletion\n4. Search\n5. Show All\n6. Exit\n");

scanf("%d", &choice);

switch(choice){

case 1:

printf("Enter Number of Students to add ");

scanf("%d", &numberOfStudents);

printf("Enter information of students:\n");

for (int j = 0; j < numberOfStudents ; j++){

printf("\nFor Student %d\n",j+1);

printf("Enter name: "); scanf("%s",s[j].name);

printf("Enter Roll Number: "); scanf("%d",&s[j].roll);

printf("Enter Gender: "); clean_stdin(); scanf("%c",&s[j].gender);

printf("Enter age: "); scanf("%d",&s[j].age);

printf("\n");

}

goto Menu;

case 2:

if (numberOfStudents >= 10) {

printf("Array is completely full. No more entries can be added. Press Any Key to return to Main Menu\n"); getchar(); goto Menu;

}

printf("Enter The Details of Student to be added\n");

printf("Enter name: "); scanf("%s",temporary.name);

printf("Enter Roll Number: "); scanf("%d",&temporary.roll);

printf("Enter Gender: "); clean_stdin(); scanf("%c",&temporary.gender);

printf("Enter age: "); scanf("%d",&temporary.age);

printf("Enter Position where the Student is to be added"); scanf("%d", &pos);

if (pos <= numberOfStudents){

for (int j = numberOfStudents - 1 ; j > pos -1 ; j++) s[j + 1] = s[j];

s[pos -1] = temporary;

}

goto Menu;

case 3:

flag = 0;

printf("Enter Roll Number of student to delete: ");

scanf("%d", rollNumberToSearch);

for (int i = 0 ; i < numberOfStudents; i++) {

if (s[i].roll == rollNumberToSearch){

printf("%d\t%s\t%c\t%d\n", s[i].roll, s[i].name, s[i].gender, s[i].age);

char ch;

printf("Are you sure you want to delte this element(y/n)?");

clean_stdin();

scanf("%c", &ch);

switch(ch){

case 'y' : flag = 1; pos = i; break;

case 'n' :

default: break;

}

}

if (flag == 1) {

for (int j = pos; j < numberOfStudents; j++) s[j] = s[j+1]; numberOfStudents--;

}

}

goto Menu;

case 4:

flag = 0;

printf("Search By Roll No. \n Enter Roll Number");

scanf("%d", rollNumberToSearch);

for (int i = 0 ; i < numberOfStudents; i++) {

if (s[i].roll == rollNumberToSearch) {

flag = 1; printf("%d\t%s\t%c\t%d\n", s[i].roll, s[i].name, s[i].gender, s[i].age);

}

}

if (flag == 0) printf("Student not Found\n");

goto Menu;

case 5:

printf("S.No.\tRoll\tName\tGender\tAge\n");

for (int i = 0; i < numberOfStudents; i++) printf("%d)\t%d\t%s\t%c\t%d\n", i+1, s[i].roll, s[i].name, s[i].gender, s[i].age);

getchar();

goto Menu;

case 6: return 0;

default: goto Menu;

}

return 0;

}