i need flow chart for this code.

#include

#include

#include

struct student

{

int rollno;

char name[20];

int phy_m,chem_m,math_m,eng_m,cs_m;

float per;

char grade;

int std;

};

FILE *fptr;

void display()

{

struct student st;

int n;

int flag=0;

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

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

printf(" Student Report ");

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

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

fptr=fopen("students.txt","r");

while(fread(&st,sizeof(struct student),1,fptr))

{

if(st.rollno==n)

{

printf(" Roll number of student : %d",st.rollno);

printf(" Name of student : %s",st.name);

printf(" Marks in Physics : %d",st.phy_m);

printf(" Marks in Chemistry : %d",st.chem_m);

printf(" Marks in Maths : %d",st.math_m);

printf(" Marks in English : %d",st.eng_m);

printf(" Marks in Computer Science : %d",st.cs_m);

printf(" Percentage : %.1f",st.per);

printf(" Grade : %c",st.grade);

flag=1;

}

}

fclose(fptr);

if(flag==0){

how to fix strange characters on .txt file?