Thread: changing data output from whole number to float two decimal places

Code:

#include<stdio.h>
//Write a function, invoked from the main function which will allow scanning data into the array.
void input(int examscores[5][4])
{
 int i,j;
 for(i=0;i<5;i++)
 {
  for(j=0;j<4;j++)
  {
   printf("input grades of student %d for exam %d\n: ",i+1,j+1);
   scanf("%d",&examscores[i][j]);
  }
  printf("\n\n");
 }
}
//Write a function that will calculate and output the average (to 2 decimal places) 
//for each student appropriately labeled.
void average(int examscores[5][4])
{
 int i,j;
 int sum=0;
 double avg_student;
 for(i=0;i<5;i++)
 {
  printf("Student %d's average score is\n ",i+1);
  sum=0;
  for(j=0;j<4;j++)
  {
   sum=sum+examscores[i][j];
  }
  avg_student=sum/4;
  printf("%.2f\n",avg_student);
 }
}
//4) Write a function that will calculate and output the average for each of the 4 exams 
//appropriately labeled.
void overall_average(int examscores[5][4])
{
 int i,j;
 int sum;
 double avg;
 for(j=0;j<4;j++)
 {
  printf("\nExam %d Average: ",j+1);
  sum=0;
  for(i=0;i<5;i++)
  {
   sum=sum+examscores[i][j];
  }
  avg=sum/5;
  printf("%2f",avg);
 }
}
 //Write a function that will output the original entry data appropriately labeled. 
//There should be column headings for the exam number and row labels for the student number as shown:
void output(int examscores[5][4])
{
 int i,j;
 printf("\n  Exam 1 Exam 2 Exam 3 Exam 4");
 for(i=0;i<5;i++)
 {
  printf("\n%d   ",i+1);
  for(j=0;j<4;j++)
  {
   printf("%d \t",examscores[i][j]);
  }
 }
}
int main(void)
{
        //Create a 2 dimensional array (5X4 (int type)) which can hold 4 exam scores for each of 5 students.
        int examscores[5][4];
        input(examscores);
        average(examscores);
        printf("\n");
        overall_average(examscores);
        printf("\n");
        output(examscores);
        printf("\n");
        getchar();
        return 0;
}

my output for these scores comes out in whole numbers. How do I get it to read out 2 decimal places to the left?

You have to use floating point numbers.

like %2f rather than %d's or float rather and int