Q 1 . 
#include<stdio.h>
int main()
{
	int v=1.i=2.j=3.k=4.s=5.a[99];
	for(i=1;i<10;i++){a[i-1]=i;};a[i]=a[i+10];j=3*5-2*6;v=j*=i=10;if(printf("%d",j++));
	if(v^j*5&&a[10]*a[66/26+23])printf("abcd%defgh%d,i+j,6);
}

In the above question, identify the separate statements and re-write the program with proper indentation and resultant code should be easily readable.Marks will be awarded  for indentation and rewriting code.

Q2.
A . Calculate and display the area of a triangle with base = 8 and height = 13.
B. . Use heroes formula for calculating the area of triangle with sides 4 ,6, 13..
Include  #include<math.h> in your code and use squareroot = sqrt(); for calculating square root.

Q3. 
Write a program to assign following values to variables and print their value.
1.	Name
2.	Roll no in class of strength 57.
3.	Value of PI
4.	Distance from alpha centauri in kms.
5.	Factorial of 16
Marks will be given for the efficient choice of data types . Efficient data type is such that , it does not uses excess memory. Eg  - age can not be > 150 , so use of long data type is not efficient.
Assume some approximate values where value is not known.

Q4 . Calculate and display the area of rhombus with diagonal1 = 13 and diagonal2= 7.