# Introduction to programming in C Week 3

**Course Name: Introduction to programming in C**

**Course Link: Click Here**

**These are Introduction to programming in C Assignment 3 Answers**

**Question 1**

**Complete the function int find_factorial(int k) to find the factorial of the positive number k.**

The factorial of a positive integer k, denoted by k!, is the product of all positive integers less than or equal to k.

k!=k×(k−1)×⋯×1.

**Input**

The first line of input is a positive integer N.

The next line contains N positive integers ki for i=1 to N.

**Output**

For each ki given as input, print factorial of ki.

The factorial of a positive integer k, denoted by k!, is the product of all positive integers less than or equal to k.

**Code:-**

```
#include <stdio.h>
int find_factorial(int k){
int i,f = 1;
for(i=1;i<=k;i++)
f*=i;
return f;
}
int main(){
int n,k;
scanf("%d",&n);
for(int i=0;i<n;i++){
scanf("%d",&k);
printf("%d ", find_factorial(k));
}
return 0;
}
```

**These are Introduction to programming in C Assignment 3 Answers**

Question 2

**Write a C function to find the kth occurrence of an odd integer in a sequence of non-negative integers, and then call your function from main.Your function should be according to the following declaration:int find_odd(int k);**

**Input**

——–

You are given the input in two lines:

The first line contains a positive integer k.

In the second line, you will be given a sequence of numbers terminated with a -1.

You have to find the kth occurrence of an odd integer in the sequence.

Note: The -1 is not part of the sequence.

**Output**

———-

If there are k odd numbers in the sequence, then output the kth occurrence of an odd number in the sequence, if present. If there are less than k odd numbers in the sequence, output -1.

Sample Input

——————

2

1 4 3 6 5 2 3 4 1 -1

Sample Output

——————–

3

**Code:-**

```
#include <stdio.h>
int find_odd(int k){
int x0=1,cnt=0;
while(x0!=-1)
{
scanf("%d",&x0);
if(x0%2)
++cnt;
if(cnt==k)
{
return x0;
break;
}
}
return -1;
}
int main(){
int k;
scanf("%d",&k);
printf("%d",find_odd(k));
return 0;
}
```

**These are Introduction to programming in C Assignment 3 Answers**

**Question 3**

**The two moving average is the sequence of averages of the last 2 entries.For the first number, no average is output.For example, if the sequence of numbers is a1,a2,a3,a4,a5The 2-moving average is (a1+a2)/2,(a2+a3)/2,(a3+a4)/2,(a4+a5)/2.**

**Code:-**

```
#include <stdio.h>
int main()
{
int x0,x1;
scanf("%d",&x0);
while(1)
{
scanf("%d",&x1);
if(x1==-1)
break;
printf("%.1f ",((x0+x1)/2.0));
x0=x1;
}
return 0;
}
```

**These are Introduction to programming in C Assignment 3 Answers**

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**These are Introduction to programming in C Assignment 3 Answers**