13.Write a program in C that asks the user to enter the marks obtained in three subjects. Calculate the average marks and display the student details.

#include <stdio.h>
int main()
{
 int phy,chem,math;
 float per=0.0;
 // Ask the user to enter marks for three subjects
 printf("\nEnter marks obtained in physics: ");
 scanf("%d",&phy);
 printf("\nEnter marks obtained in chemistry: ");
 scanf("%d",&chem);
 printf("\nEnter marks obtained in mathematics: ");
 scanf("%d",&math);
 // Calculate the average marks
 per= (phy+chem+math)/3.0;
 // Display the student details
 printf("\nStudent details:\n");
 printf("\nMarks obtained in Physics: %d",phy);
 printf("\nMarks obtained in chemistry: %d",chem);
 printf("\nMarks obtained in mathematics: %d", math);
 printf("\nAverage marks: %.2f", per);
 return 0;
}
Output:
 Enter the marks obtained in physics:35
 Enter the marks obtained in chemistry:35
 Enter the marks obtained in mathematics:35
 Student details:
 Marks obtained in physics:35
 Marks obtained in chemistry:35
 Marks obtained in mathematics:35
 Average marks:35.00