Can You please check this code i can't delete information student.somthing error with this and can't find a bug in this code. please our deadline is today so please help us.

#include

#include

#include

struct students{

char name[100];

char sex[100];

char id[100];

char age[100];

char grade[100];

int i;

char score[100];

char tel[100];

float math;

float physic;

float computer;

float khlanguage;

float history;

float sum;

float avg;

float mix;

};

struct students pd[100];

int i,n;

char filename[50];

void add(char filename[] ){

FILE*fa;

printf(" \tEnter user name: ");

scanf("%s",&pd[n].name);

printf("\tEnter id: ");

scanf("%s",&pd[n].id);

printf("\tEnter sex:");

scanf("%s",&pd[n].sex);

printf("\tEnter Student age: ");

scanf("%s",&pd[n].age);

printf("\tEnter user grade: ");

scanf("%s",&pd[n].grade);

printf("\tEnter telephone (+885): ");

scanf("%s",&pd[n].tel);

i++;

fa = fopen("student22.txt","a");

fprintf(fa,"\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel);

fprintf(fa," " );

fclose(fa);

}

//function to search information of students by id

void search(char filename[]){

char id[100];

FILE*fs;

int flag=0;

fs = fopen("student22.txt","r");

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

printf(" \tSEARCH ID:"); scanf("%s",id);

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

printf("\tName\tid\tsex\tage\tgrade\ttelephone ");

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

while(fscanf(fs,"\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel)!=EOF){

i++;

if(strcmp(pd[n].id,id)==0){

printf("\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel);

flag=1;

}

}

if(flag==0){

printf("\t*****NOT FOUND*****");

}

fclose(fs);

}

// function for display all students information

void disply_information(char filename)

{

FILE*fd;

int i;

fd=fopen("student22.txt","r");

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

printf("\tName\tid\tsex\tage\tgrade\ttelephone ");

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

while(fscanf(fd,"\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel)!=EOF){

i++;

printf("\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel);

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

}

fclose(fd);

}

// function for delete students informations

void dalete(char filename){

FILE*f1 ;

int id[100],f=0,j;

int flag=0;

f1=fopen("student22.txt","r");

printf("\tEnter ID :");scanf("%s",id);

while(fscanf(f1,"\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel)!=EOF){

if(strcmp(pd[n].id,id)==0){

flag=1;

strcpy(pd[n].id,pd[n+1].id);

strcpy(pd[n].name, pd[n+1].name);

strcpy(pd[n].sex,pd[n+1].sex);

strcpy(pd[n].age,pd[n+1].age);

strcpy(pd[n].grade,pd[n+1].grade);

strcpy(pd[n].tel,pd[n+1].tel);

printf(" \t\t---<<<<*** DALETE IS DONE ***>>>>--- ");

}

}if(flag==0){

printf(" \t\t<<<<<*** Student not Found ***>>>>>> ");

}

fclose(f1);

}

// functions for add score students information

void add_score(char filename)

{

int k;

char id[100];

FILE*fs,*f1;

f1= fopen("student22.txt","r");

fs=fopen("score22.txt","a");

int status=0;

printf("\tmath\tphysic\tcomputer\tkh\thistory\t ");

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

printf("\tEnter id: ");scanf("%s",id);

while(fscanf(f1,"\t%s\t%s\t%s\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex,pd[n].age,pd[n].grade,pd[n].tel)!=EOF){

if(strcmp(pd[i].id,id)==0){

status=1;

printf(" \tEnter the math score: ");

scanf("%f",&pd[i].math);

printf("\tEnter the physic score: ");

scanf("%f",&pd[i].physic);

printf("\tEnter the computer score: ");

scanf("%f",&pd[i].computer);

printf("\tEnter the khmerlanguage score: ");

scanf("%f",&pd[i].khlanguage);

printf("\tEnter the history score: ");

scanf("%f",&pd[i].history);

pd[i].sum=pd[i].math + pd[i].physic + pd[i].computer + pd[i].khlanguage + pd[i].history;

pd[i].avg=pd[i].sum/5;

printf("\t*****UPDATE IS DONE***** ");

fprintf(fs," \t%s\t%s\t%2.f\t%2.f\t%2.f\t\t%2.f\t%2.f ",pd[i].id,pd[i].name,pd[i].math,pd[i].physic,pd[i].computer,pd[i].khlanguage,pd[i].history);

fprintf(fs," The Score of all subject: %f",pd[i].sum);

fprintf(fs," The Average is : %f",pd[i].avg);

break;

}

}

if (status==0)

{

printf("\t*****NOT FOUND*****");

}

fclose(f1);

fclose(fs);

}

// update students informations

void update_students_information()

{

char id[100];

int status=0;

printf("\tName\tid\tsex\tage\tgrade\ttelephone ");

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

printf("\tEnter id: ");scanf("%s",id);

for(int i=0 ;i

{

if(strcmp(pd[i].id,id)==0)

{

status=1;

printf(" \tNew user name: "); scanf("%s",&pd[i].name);

printf("\tNew id: "); scanf("%s",&pd[i].id);

printf("\tNew sex:"); scanf("%s",pd[i].sex);

printf("\tNew Student age: "); scanf("%s",&pd[i].age);

printf("\tNew user grade: "); scanf("%s",&pd[i].grade);

printf("\tNew telephone (+885): "); scanf("%s",&pd[i].tel);

printf("\t*****UPDATE IS DONE***** ");

break;

}

}

if (status==0)

{

printf("\t*****NOT FOUND*****");

}

}

void up_score()

{

char id[100];

int status=0;

printf("\tmath\tphysic\tcomputer\tkh\thistory\t ");

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

printf("\tEnter id: ");scanf("%s",id);

for(int i=0 ;i

{

if(strcmp(pd[i].id,id)==0)

{

status=1;

printf(" \tEnter the math score: ");

scanf("%f",&pd[i].math);

printf("\tEnter the physic score: ");

scanf("%f",&pd[i].physic);

printf("\tEnter the computer score: ");

scanf("%f",&pd[i].computer);

printf("\tEnter the khmerlanguage score: ");

scanf("%f",&pd[i].khlanguage);

printf("\tEnter the history score: ");

scanf("%f",&pd[i].history);

pd[i].sum=pd[i].math + pd[i].physic + pd[i].computer + pd[i].khlanguage + pd[i].history;

pd[i].avg=pd[i].sum/5;

printf("\t*****UPDATE IS DONE***** ");

break;

}

}

if (status==0)

{

printf("\t*****NOT FOUND*****");

}

}

// function for display score students information

void display_scorc_studentd(){

FILE*f;

f=fopen("score22.txt","r");

printf("\tid\tname\tmath\tphysic\tcomputer\tkh\thistory\t ");

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

while(fscanf(f," \t%s\t%s\t%2.f\t%2.f\t%2.f\t\t%2.f\t%2.f ",pd[i].id,pd[i].name,pd[i].math,pd[i].physic,pd[i].computer,pd[i].khlanguage,pd[i].history)!=EOF){

if(pd[i].id==0)

{

printf("hi");

}

else

{

printf(" \t%s\t%s\t%2.f\t%2.f\t%2.f\t\t%2.f\t%2.f ",pd[i].id,pd[i].name,pd[i].math,pd[i].physic,pd[i].computer,pd[i].khlanguage,pd[i].history);

printf(" The Score of all subject: %f",pd[i].sum);

printf(" The Average is : %f",pd[i].avg);

}

}

fclose(f);

}

// function search male/female students informations

void m_or_f()

{

char sex[100];

int flag=0;

printf(" \tSEARCH SEX(m/f):"); scanf("%s",sex);

printf("\tName\tid\tsex\tage\tgrade\ttelephone ");

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

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

if(strcmp(pd[i].sex,sex)==0){

flag=1;

printf("\t%s\t%s\t%s\t%s\t%s\t%s ",pd[i].name,pd[i].id,pd[i].sex,pd[i].age,pd[i].grade,pd[i].tel);

}

}

if(flag==0){

printf("\t*****NOT FOUND*****");

}

}

// function for display score from big to small

void mix()

{

printf("\tID\tName\tSex\tAvg ");

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

for(int k=pd[k].avg ;k>=0 ;k--)

{

{

printf("\t%s\t%s\t%s\t%f " ,pd[k].id,pd[k].name,pd[k].sex,pd[k].avg);

}

}

}

//void file_students()

//{

// FILE *file;

// file = fopen("students_note.txt","r");

// while (fscanf(file,"\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex)!=EOF)

// {

// n++;

// }

//}

void fil()

{

FILE *file;

file = fopen("students_note.txt","w");

// for (int i=1 ; i< n ;i++)

// {

// if(strcmp(pd[i].id,"")==0)

// {

//

// fprintf(file,"%s",pd[i].id);

// }

// else{

// fprintf(file,"\t%s\t%s\t%s ",pd[n].name,pd[n].id,pd[n].sex);

// }

//

//}

}

void loading()

{

int i,j;

printf("Loading........");

for (i=1 ; i<= 20; i++)

{

for(j=0; j<=100000000; j++);

printf("%c",177);

}

}

// for call function use in main()

int main(){

system("color B0");

// file_students();

int choice;

loading();

printf(" ");

printf("\t\t\t\t\t======================================================================================================================== ");

printf("\t\t\t\t\t**************************************| WELCOME |**************************** ");

printf("\t\t\t\t\t**************************************| Project in c program < students record system > |**************************** ");

printf("\t\t\t\t\t======================================| |============================ ");

printf("\t\t\t\t\t======================================================================================================================== ");

printf(" ------------------------------------------------------------------------------------------------------ ");

printf(" |1) add students information. | 2)search information by id. | ");

printf(" |----------------------------------------------------------------------------------------------------| ");

printf(" |3) display all students information. | 4) update students information. | ");

printf(" | ---------------------------------------------------------------------------------------------------| ");

printf(" |5) for delete students informations. | 6) search male/female students informations. | ");

printf(" |----------------------------------------------------------------------------------------------------| ");

printf(" |7) add score student. | 8) display student score. | ");

printf(" |----------------------------------------------------------------------------------------------------| ");

printf(" |9) update score students. | 10) display score from big to small. | ");

printf(" |----------------------------------------------------------------------------------------------------| ");

printf(" |11) Exit the program. | | ");

printf(" |----------------------------------------------------------------------------------------------------|");

while (1){

printf(" ");

printf(" \t\tchoses option [1-11]: "); scanf("%d",&choice);

if(choice==1){

add ("student22.txt");

}

else if(choice==2){

search ("student22.txt");

}

else if(choice==3)

{

disply_information("student22.txt");

}

else if (choice==4)

{

update_students_information();

}

else if (choice==5)

{

dalete("student22.txt");

}

else if (choice==6)

{

m_or_f();

}

else if (choice==7)

{

add_score("student22.txt");

}

else if (choice==8)

{

display_scorc_studentd();

}

else if (choice == 9)

{

up_score();

}

else if(choice == 10)

{

mix();

}

else if (choice==11)

{

fil();

printf("***** exit program*******");

break ;

}

}

}