Average Marks,Highest Mark,Lowest Mark,Count ds 1 (i-v)

/*1. A teacher is inputting the marks of his students for a Mathematics test. The marks range 
from 0 to 100. 
i) Calculate the Average Marks of the Students: 
 Write a program to input the marks of n students and calculate the average marks. 
ii) Find the Highest Mark: 
Write a program to input the marks of n students and find the highest mark obtained in 
the test. 
iii)Find the Lowest Mark: 
Write a program to input the marks of n students and find the lowest mark obtained in 
the test. 
iv) Count Students with Marks Above Average: 
Write a program to input the marks of n students and calculate the average marks. 
Then, count how many students scored marks above the average.
v) Calculate Grade Distribution: 
Extend the previous program to categorize students' marks into different grade 
bands: A (90-100), B (80-89), C (70-79), D (60-69), and F (below 60). 
Output the count of students in each grade band. */

#include<stdio.h> 
int main() 
{ 
  int n;                   //students number from user 
  printf("Enter the number of students:"); 
  scanf("%d",&n); 
 
  int arr[n];              //the marks from user 
  printf("Enter the results for students:\n"); 
  for (int i=0;i<n;i++) 
 
  { 
  scanf("%d",&arr[i]); 
  } 
  printf("\n"); 
 
  int sum=0;              //the average code 
  for (int i=0;i<n;i++) 
  { 
  sum=sum+arr[i]; 
  } 
  double ave=(double)sum/n; 
  printf("The average:%.4f\n",ave); 
 
 int max=arr[0];          //max, min code 
 int min=arr[0]; 
 
 for (int i=0;i<n;i++) 
 { 
 if(arr[i]>max) 
  { 
 max=arr[i]; 
  } 
 if(arr[i]<min) 
{ 
min=arr[i]; 
} 
} 
printf("The highest mark is: %d\n",max); 
printf("The lowest mark is: %d\n",min); 
printf("\n"); 
int count=0;                      
for (int i=0;i<n;i++){ 
if(arr[i]>ave)      
 { 
count++; 
} 
} 
//The number of students who got above average mark code 
printf("The number of students who got above average mark is:%d\n",count); 
printf("\n"); 
int count1=0;                 
int count2=0; 
int count3=0; 
int count4=0; 
int count5=0; 
for (int i=0;i<n;i++){ 
// Grade Distribution code 
if(arr[i]>=90 && arr[i]<101){ 
count1++; 
}else if(arr[i]>=80 && arr[i]<90){ 
count2++; 
}else if(arr[i]>=70 && arr[i]<80){ 
count3++; 
}else if(arr[i]>=60 && arr[i]<70){ 
count4++; 
}else {count5++;} 
} 
printf("The numbers of students who got A,B,C,D and F are: %d, %d, %d, %d, 
%d.",count1,count2,count3,count4,count5); 
printf("\n"); 
printf("Grade A (90-100): %d students\n",  count1); 
printf("Grade B (80-89):  %d students\n",   count2); 
printf("Grade C (70-79):  %d students\n",   count3); 
printf("Grade D (60-69):  %d students\n",   count4); 
printf("Grade F (below 60): %d students\n",count5); 
return 0; 
}