Notes

//Random Number Generator:
#include <stdio.h>
int Q=100, a=17, c=43;
int X0 = 0;
int random() {
X0 = (a * X0 + c) % Q;
return X0;
}
int main() {
int i, n;
printf("Enter the number of random numbers to generate: ");
scanf("%d", &n);
printf("Enter any random number: ");
scanf("%d", &X0);
printf("n Random Numbers are:n");
for (i = 0; i < n; ++i) {
printf("%dn", random());
}
return 0;
}



//Euclidean Algorithm to find GCD
#include<stdio.h>
int euclidean(int a,int b){
int r;
while(b!=0){
r=a%b;
a=b;
b=r;
}
return a;
}

int main(){
int a,b;
printf("n Enter two numbers ");
scanf("%d%d",&a,&b);
printf("GCD(%d,%d)=%d ",a,b,euclidean(a,b));
}


// Extended Euclidean algorithm
#include <stdio.h>
int extendedEuclidean(int a, int b, int *x, int *y) {
if (b == 0) {
*x = 1;
*y = 0;
return a;
}
int x1, y1;
int gcd = extendedEuclidean(b, a % b, &x1, &y1);
*x = y1;
*y = x1 - (a / b) * y1;
return gcd;
}
int main() {
int a, b, x, y;
printf("Enter two numbers: ");
scanf("%d %d", &a, &b);
int gcd = extendedEuclidean(a, b, &x, &y);
printf("GCD of %d and %d is %dn", a, b, gcd);
printf("Coefficients: x = %d, y = %dn", x, y);
return 0;
}


//Sum of two binary numbers
#include<stdio.h>
#include<string.h>
void addBinary(char a[], char b[],char result[]){
int i=strlen(a)-1;
int j=strlen(b)-1;
int carry=0, sum=0,l;
int k=(i>j?i:j)+1;
result[k+1]='';
k--;
while(i>=0||j>=0||carry==1){
sum=carry;
if(i>=0) sum+=a[i--]-'0';
if(j>=0) sum+=b[j--]-'0';
carry=sum>>1;
result[k--] = (sum&1)+'0';
}
if(k==0){
for(l=0;result[l+1]!='';l++){
result[l]=result[l+1];
}
result[strlen(result)-1]='';
}
}
int main(){
char a[100],b[100],result[101];
printf("Enter first binary number: ");
scanf("%s",a);
printf("Enter second binary number: ");
scanf("%s",b);
addBinary(a,b,result);
printf("Sum of the binary numbers is: %sn",result);
return 0;
}





//Union of two sets:
#include<stdio.h>
#define max 100
int count=0;
void input(int a[], int n){
int i;
for(i=0;i<n;i++){
scanf("%d",&a[i]);
}
}
void display(int a[], int n){
int i;
for(i=0;i<n;i++){
printf("%dt",a[i]);
}
}
void unionOfSet(int a[], int b[], int c[], int m, int n){
int i,j;
count = 0;
for(i=0;i<m;i++){
c[i] = a[i];
count++;
}
for(i=0;i<n;i++){
for(j=0;j<count;j++){
if(b[i] == c[j]){
break;
}
}
if(b[i] != c[j]){
c[count] = b[i];
count++;
}
}
}
int main(){
int a[max], b[max], c[max],m,n,i;
printf("nEnter the size of set A: ");
scanf("%d",&m);
printf("nEnter the size of set B: ");
scanf("%d",&n);
printf("nEnter the elements of set A: n");
input(a,m);
printf("nEnter the elements of set B: n");
input(b,n);
unionOfSet(a, b, c, m, n);
printf("nAUB is:n");
display(c,count);
return 0;
}



//Intersection of two sets
#include<stdio.h>
#define max 100
int count=0;

void input(int a[], int n){
int i;
for(i=0;i<n;i++){
scanf("%d",&a[i]);
}
}
void display(int a[], int n){
int i;
for(i=0;i<n;i++){
printf("%dt",a[i]);
}
}
void intersection(int a[], int b[], int c[], int m, int n){
int i,j;
count = 0;
for(i=0;i<m;i++){
for(j=0;j<n;j++){
if(a[i]==b[j]){
c[count] = a[i];
count++;
break;
}
}
}
}


int main(){
int a[max], b[max], c[max],m,n,i;
printf("nEnter the size of set A: ");
scanf("%d",&m);
printf("nEnter the size of set B: ");
scanf("%d",&n);
printf("nEnter the elements of set A: n");
input(a,m);
printf("nEnter the elements of set B: n");
input(b,n);
intersection(a, b, c, m, n);
printf("nAnB is:n");
display(c,count);
return 0;
}




//Difference of two sets
#include<stdio.h>
#include<conio.h>
#define MAX 40
void input(int set[], int);
int SetDifference(int a[],int, int B[],int, int C[]);
int main()
{
int a[MAX],B[MAX],C[MAX],L,i;
int N,M;
printf("nNo. of elements in the Minuend (set A): ");
scanf("%d",&M);
printf("nNo. of elements in the Subtrahend (set B) : ");
scanf("%d",&N);
printf("Enter elements of Minuend (Set A)");
input(B,M);
printf("Enter elements of Subtrahend (Set B)");
input(a,N);
L=SetDifference(a,N,B,M,C);
printf("n Difference of two sets: A-B: ");
for(i=0;i<L;i++)
printf("%d ",C[i]);
}
void input(int set[],int n)
{
int i,x;
printf("nEnter set elements : n");
for(i=0;i<n;i++)
scanf("%d",&set[i]);
}

int SetDifference(int a[],int n, int B[],int m,int C[]){
int k=0,i,j,flag;
for(i=0;i<m;i++){
flag=1;
for(j=0;j<n;j++) {
if(B[i]==a[j]){
flag=0;
break;
}
}
if(flag==1)
C[k++]=B[i];
}
return k--;
}




//TT of conjunction, disjunction and negation:
#include <stdio.h>
#include <stdbool.h>
bool conjuction(bool p,bool q){
return p && q;
}
bool disjunction(bool p, bool q){
return p || q;
}
bool negation(bool p){
return !p;
}
void display(bool p){
if(p==true){
printf("Ttt");
}
else{
printf("Ftt");
}
}
int main() {
bool p[10]={true,true,false,false};
bool q[10]={true, false, true, false};
int i;
printf("n---------------------------------------------------------------------n");
printf("pttqttp^qttpVqtt~pn");
printf("---------------------------------------------------------------------n");
for(i=0;i<4;i++){
display(p[i]);
display(q[i]);
display(conjuction(p[i],q[i]));
display(disjunction(p[i],q[i]));
display(negation(p[i]));
printf("n");
}
return 0;
}



//Truth table of Implication and biconditional
#include<stdio.h>
#include<stdbool.h>

bool imlication(bool p, bool q){
return !p||q;
}
bool bicondition(bool p,bool q){
return (!p||q)&&(!q||p);
}
void display(bool p){
if (p==true)
printf("Ttt");
else
printf("Ftt");
}
int main()
{
bool p[]={true,true,false,false};
bool q[]={true,false,true,false};
int i;
printf("n------------------------------------------------------------------n");
printf("PttQttP-->qttP<-->Qn");
printf("------------------------------------------------------------------n");
for(i=0;i<4;i++){
display(p[i]);
display(q[i]);
display(imlication(p[i],q[i]));
display(bicondition(p[i],q[i]));
printf("n");
}
}




//Construct TT of given proposition: (P^Q)🡪R)
#include <stdio.h>
#include <stdbool.h>
bool conjuction(bool p,bool q){
return p && q;
}
bool preposition(bool p, bool q, bool r){
return !conjuction(p, q) || r;
}
void display(bool p){
if(p==true){
printf("Ttt");
}
else{
printf("Ftt");
}
}

int main(){
bool p[10]={true, false, true, false, true, false, true, false};
bool q[10]={true, true, false, false, true, true, false, false};
bool r[10]={true, true, true, true, false, false, false, false};
int i;
printf("Truth Table of the proposition (P ^ Q) --> R.n");
printf("n----------------------------------------------------------------------------n");
printf("PttQttRttP^Qtt(P^Q)-->Rn");
printf("----------------------------------------------------------------------------n");
for(i=0; i<8; i++){
display(p[i]);
display(q[i]);
display(r[i]);
display(conjuction(p[i],q[i]));
display(preposition(p[i],q[i],r[i]));
printf("n");
}
}




//Check Tautology, Contradiction or Contengency:
#include <stdio.h>
#include <stdbool.h>
bool disjunction(bool p,bool q){
return p || q;
}
bool proposition(bool p, bool q, bool r){
return !disjunction(p, q) || r;
}
void display(bool p){
if(p==true){
printf("Ttt");
}
else{
printf("Ftt");
}
}

int main(){
int i;
bool p[10]={true, false, true, false, true, false, true, false};
bool q[10]={true, true, false, false, true, true, false, false};
bool r[10]={true, true, true, true, false, false, false, false};
bool isTautology = true;
bool isContradiction = true;
printf("Truth Table of the proposition (P V Q) --> R.n");
printf("n----------------------------------------------------------------------------n");
printf("PttQttRttPVQtt(PVQ)-->Rn");
printf("----------------------------------------------------------------------------n");
for (i = 0; i < 8; i++) {
bool result = proposition(p[i], q[i], r[i]);
display(p[i]);
display(q[i]);
display(r[i]);
display(disjunction(p[i],q[i]));
display(proposition(p[i],q[i],r[i]));
printf("n");
if (!result) {
isTautology = false;
}
if (result) {
isContradiction = false;
}
}

if (isTautology) {
printf("nThe proposition is a Tautology.n");
} else if (isContradiction) {
printf("nThe proposition is a Contradiction.n");
} else {
printf("nThe proposition is a Contingency.n");
}
return 0;
}



//Sum of Natural Numbers:
#include<stdio.h>
int Sum(int n){
int sn=0;
if (n<=0){
return 0;
}
else(n>=1);
return n+Sum(n-1);
}
int main(){
int c;
int n;
printf("Up to how many natural numbers?n");
scanf("%d",&n);
c=Sum(n);
printf("The Sum of natural number is: %d",c);
return 0;
}




//Factorial:
#include<stdio.h>

long int facto(int n){
if(n==0 || n==1){
return 1;
}
else{
return n*facto(n-1);
}
}

int main(){
int c;
int n;
printf("Factorial of?n");
scanf("%d",&n);
c=facto(n);
printf("The factorial of given number is %d",c);
return 0;
}





//Fibonacci Series, recursion:
#include<stdio.h>
int fibo(int n){
if(n==0){
return 0;
}
else if(n==1){
return 1;
}
else{
return fibo(n-2)+ fibo (n-1);
}
}
int main(){
int c;
int n;
printf("Which fibonacci number?n");
scanf("%d",&n);
c=fibo(n);
printf("The %dth fibo number is %d",n,c);
return 0;
}




//Power (a,b) Recursion:
#include <stdio.h>
int Power(int a, int b)
{
if(b==0)
return 1;
else
return(a* Power(a,b-1));
}
int main()
{
int a,b, result;
printf("Enter a and bn");
scanf("%d%d",&a,&b);
result=Power(a,b);
printf("Power(%d,%d) = %d n", a, b, result);
return 0;
}




//TOH
#include<stdio.h>
void TOH(int n, char A, char B, char C) {
if (n == 1) {
printf("Move disk 1 from rod %c to rod %cn", A, B);
return;
}
TOH(n - 1, A, C, B);
printf("Move disk %d from rod %c to rod %cn", n, A, B);
TOH(n - 1, C, B, A);
}
int main() {
int n;
printf("Enter the number of disks: ");
scanf("%d", &n);
TOH(n, 'A', 'C', 'B'); // A, B and C are names of rods
return 0;
}



//Binary Search:
#include <stdio.h>
#include <math.h>
#define Max 50
int binarySearch(int arr[], int low, int high, int key)
{
int mid;
if (high >= low)
{
mid = floor ((low + high) / 2 );
if (arr[mid] == key)
return mid;

else if (arr[mid] > key)
return binarySearch(arr, low, mid - 1, key);

else if (arr[mid] < key)
return binarySearch(arr, mid + 1, high, key);
}
return -1;
}
int main()
{
int i,low,high,key,index;
// Must be Sorted Array
int A[]={20,25,42,52,64,79,86,92,96,100};
low=0;
high=9;
printf("Array:");
for(i=0;i<=high;i++)
printf(" t %d",A[i]);
printf("nEnter the Key to be searched: ");
scanf("%d", &key);
index=binarySearch(A,low,high,key);
if(index==-1)
printf("n Data don't present in the given Array");
else
printf(" n Data present at %d index.", index);
return 0;
}



//Merge Sort:
#include<stdio.h>
#include<conio.h>
#define MAX_SIZE 50
void Display_Array_Element( int A[MAX_SIZE], int len)
{
int i;
for(i=0; i<len; i++)
printf(" t %d ", A[i]);
}
void Merge(int A[MAX_SIZE], int left, int Mid, int right )
{
int i=0,k,p, Temp[MAX_SIZE];
k=left; p=Mid+1;
while(left<=Mid && p<=right)
{
if(A[left]< A[p])
Temp[i++]=A[left++];
else
Temp[i++]=A[p++];
}
while(left<=Mid)
Temp[i++]=A[left++];
while(p<=right)
Temp[i++]=A[p++];
for(i=k; i<=right; i++)
A[i]=Temp[i-k];
}
void Merge_Sort(int A[MAX_SIZE], int left, int right)
{
int Mid;
if(left<right)
{
Mid=(left+right)/2;
Merge_Sort(A, left, Mid);
Merge_Sort(A, Mid+1, right);
Merge(A, left, Mid,right);
}
}
void main()
{
int Len=8;// total number of elements in the array
int A[]={100,2,21,59,46,28,9,99};
printf("n Before Sorting:");
Display_Array_Element(A,Len);
Merge_Sort(A,0,Len-1);
printf("n After Sorting: ");
Display_Array_Element(A,Len);
getch();
}