Write a program, that takes 16-Elements in Two-Dimensional-Array that has 4 rows & 4 columns, then display the diagonal of Matrix.

Write a program, that takes 16-Elements in Two-Dimensional-Array that has 4 rows & 4 columns, then display the diagonal of Matrix.

#include<iostream>

using namespace std;

int main()

{

int arr[4][4],i,j;

cout<<"Enter elements of array: "<<endl;

                                           for(i=0; i<4; i++)

{

for(j=0; j<4; j++)

{

cin>>arr[i][j];

}

}

cout<<"Daignal elements are :"<<endl;

for(i=0; i<4; i++)

{

for(j=0; j<4; j++)

{

if(i==j)

cout<<arr[i][j]<<"\t";

}

}

                             }

Take three values from the user and find discriminant then find the root if disc is greater than less than or equal to zero

Take three values from the user and find discriminant then find the root if disc is greater than less
                                                       than or equal to zero

      #include <iostream>
#include <cmath>
using namespace std;

int main() {

    float a,b,c,R1,R2,disc,realPart,imgPart;
    cout<<"Enter value for a:";
    cin>>a;
    cout<<"Enter value for b:";
    cin>>b;
    cout<<"Enter value for c:";
    cin>>c;
 
 
    disc=b*b-4*a*c;
 
    if(disc>0)
{
        R1=(-b+sqrt(disc))/(2*a);
        R2=(-b-sqrt(disc))/(2*a);
        cout<<"Roots are real and different because discriminant is greater then zero '0'."<<endl;
        cout<<"R1 ="<<R1<<endl;
        cout<<"R2 ="<<R2<<endl;
    }
 
    else if(disc==0)
{
        cout<<"Roots are real and same because disciminant is equal to zero '0'."<<endl;
        R1=(-b/(2*a));
        cout<<"R1 = R2 ="<<R1<<endl;
    }

    else
{
        realPart=-b/(2*a);
        imgPart=sqrt(-disc)/(2*a);
        cout<<"Roots are complex and different because discriminant is less then zero '0'."<<endl;
        cout<<"R1 ="<<realPart<<"+"<<imgPart<<"i"<<endl;
        cout<<"R2 ="<<realPart<<"-"<<imgPart<<"i"<<endl;
    }

    return 0;
}

Write a program, that takes 12-Elements in Two-Dimensional-Array that has 3 rows & 4 columns, then Transpose of that Matrix & Display it.

Write a program, that takes 12-Elements in Two-Dimensional-Array that has 3 rows & 4                             columns, then Transpose of that Matrix & Display it.

       #include <iostream>
using namespace std;

int main()
{
    int a[3][4],trans[4][3],i,j;



    cout<<endl<<"Enter elements of matrix: "<<endl;
    for(i=0; i<3; i++)
    {
    for(j=0; j<4; j++)
    {

        cin>>a[i][j];
    }
}

    cout<<endl<<"Entered Matrix: "<<endl;
    for(i=0; i<3; i++)
    {
        for(j=0; j<4; j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl;
    }
 
cout << endl << "Transpose of Matrix: " << endl;
    for(i=0; i<4; i++)
    {
        for(j=0; j<3; j++)
        {
            cout<<a[j][i]<<"\t";
        }
        cout<<endl;
}


}

Declare and define an array and sort the values in ascending order.

Declare and define an array and sort the values in ascending order.

#include<iostream>

using namespace std;

main()

 {

 int i,a[10],temp,j;

 

 cout<<"Enter any 10 num in array: \n";

 for(i=0;i<=10;i++)

 {

 cin>>a[i];

 }

 cout<<"\nData before sorting: ";

 for(j=0;j<10;j++)

 {

 cout<<a[j];

 }

 for(i=0;i<=10;i++)

 {

 for(j=0;j<=10-i;j++)

 {

 if(a[j]>a[j+1])

 {

 temp=a[j];

 a[j]=a[j+1];

 a[j+1]=temp;

 }

 }

 }

 cout<<"\nData after sorting: ";

 for(j=0;j<10;j++)

 {

 cout<<a[j];

 }

 

 }

take a single dimensional array set the default values to 0 or -1, take choice from the user if a inser values the values for the array, if b update the values and if c delete values from the array.

take a single dimensional array set the default values to 0 or -1, take choice from the user if a inser values  the values for the array, if b update the values and if c delete values from the array.
#include <iostream>
using namespace std;

int main()
{
int arr[5]={0},i,num;
char ss;
ii:

cout<<endl<<"OPTIONS: "<<endl;
cout<<endl<<"Press 'a' for inserting value in specific index."<<endl;
cout<<"Press 'b' for updating value in specific index."<<endl;
cout<<"Press 'c' for deleting value the specific index value."<<endl;

cout<<endl<<"Select option:";
cin>>ss;

cout<<endl;
switch(ss)
{
case 'a':
{

cout<<"enter index on which the number is to be add:";
cin>>i;
if(arr[i]==0)
{

cout<<"enter value to add: ";
cin>>num;
arr[i]=num;}

else
{
cout<<"selected index is not zero any more."<<endl<<endl;
}
}
break;

case 'b':
{

cout<<"enter index number which you want to update:";
cin>>i;
cout<<"enter updated value: ";
cin>>arr[i];
}
break;

case 'c':
{

cout<<"enter index number which you want to delet:";
cin>>i;
cout<<"enter 0 to delet value: ";
cin>>arr[i];

}
break;

default:
{
cout<<"Selected option is not correct...."<<endl;
cout<<"Choose the correct option from below menu:";
goto ii;
}
}
cout<<endl<<endl;
cout<<"Array elements are:";
for(int i=0; i<5; i++)
{
cout<<" "<<arr[i]<<"\t";
}
goto ii;
}

Write a program to pass array as an argument to the function.

Write a program to pass array as an argument to the function.

#include<iostream>

using namespace std;

void display (int marks [5]);

int main()

{

int marks[5]={88,34,54,45,32};

display (marks);

return 0;

}

void display (int m[5])

{

cout<<"displaying marks "<<endl;

for (int i=0;i<5;++i)

{

cout<<"student"<<i+1<<"  "<<m[i]<<endl;

}

}

Write a program using array and swap first and last value of array.

Write a program using array and swap first and last value of                                                       array.

# include<iostream>

using namespace std;

main()

{

int a[100],i,n,temp;

cout<<"Enter element of Array you want to insert "<<endl;

cin>>n;

for(i=0;i<n;i++)

{

cout<<"Enter the element "<<i+1<<endl;

cin>>a[i];

}

temp=a[0];

a[0]=a[n-1];

a[n-1]=temp;

cout<<"After the swaming the Array Are "<<endl;

for(i=0;i<5;i++)

cout<<a[i]<<endl;

return 0;

}

Implement stack

 Implement stack

#include<stdio.h>

#define MAX_SIZE 101

int A[MAX_SIZE]; // integer array to store the stack 

int top = -1;  // variable to mark top of stack in array

// Push operation to insert an element on top of stack. 

void Push(int x) 

{

  if(top == MAX_SIZE -1) { // overflow case. 

printf("Error: stack overflow\n");

return;

}

A[++top] = x;

}

// Pop operation to remove an element from top of stack.

void Pop() 

{

if(top == -1) { // If stack is empty, pop should throw error. 

printf("Error: No element to pop\n");

return;

}

top--;

}

// Top operation to return element at top of stack. 

int Top() 

{

return A[top];

}

// This function will return 1 (true) if stack is empty, 0 (false) otherwise

int IsEmpty()

{

    if(top == -1) return 1;

    return 0;

}

// This function is just to test the implementation of stack. 

// This will print all the elements in the stack at any stage. 

void Print() {

int i;

printf("Stack: ");

for(i = 0;i<=top;i++)

printf("%d ",A[i]);

printf("\n");

}

int main() {

  // Code to test the implementation. 

  // calling Print() after each push or pop to see the state of stack. 

Push(2);Print();

Push(5);Print();

Push(10);Print();

Pop();Print();

Push(12);Print();

}

Write a program to pass an array of structure to the function.

Write a program to pass an array of structure to the function.

#include<iostream>

using namespace std;

struct student

{

char fname[50];

char sname[50];

int id;

unsigned int  phone;

};

void fun(student[]);

main()

{

student s[3];

for(int i=0; i<3; i++)

{

cout<<"enter the data of student"<<i+1<<endl;

cout<<"enter the 1st name of the student"<<endl;

cin>>s[i].fname;

cout<<"enter the 2nd name of the student"<<endl;

cin>>s[i].sname;

cout<<"enter the id of the student :"<<endl;

cin>>s[i].id;

cout<<"enter the phone number of the student:"<<endl;

cin>>s[i].phone;

}

fun(s);

 }

 void fun(student r[])

 {

 system("CLS");

cout<<"      name    \t      id       \t     phone  "<<endl;

for(int i=0; i<3; i++)

{

cout<<i+1<<"  "<<r[i].fname<<" "<<r[i].sname<<"  \t    "<<r[i].id<<"     \t    "<<r[i].phone<<endl;

}

}

Write a program to enter data into a structure variable of array type that has 10 elements and each record contains three fields.

Write a program to enter data into a structure variable of array type that has 10 elements and                                                     each record contains three fields.

#include<iostream>
using namespace std;

struct student
{
char fname[50];
char sname[50];
int id;
unsigned int  phone;

};
main()
{
student s[3];
for(int i=0; i<3; i++)
{
cout<<"enter the data of student"<<i+1<<endl;
cout<<"enter the 1st name of the student"<<endl;
cin>>s[i].fname;
cout<<"enter the 2nd name of the student"<<endl;
cin>>s[i].sname;
cout<<"enter the id of the student :"<<endl;
cin>>s[i].id;
cout<<"enter the phone number of the student:"<<endl;
cin>>s[i].phone;

 }
 system("CLS");
cout<<"      name    \t      id       \t     phone  "<<endl;
for(int i=0; i<3; i++)
{
cout<<i+1<<"  "<<s[i].fname<<" "<<s[i].sname<<"  \t    "<<s[i].id<<"     \t    "<<s[i].phone<<endl;
}


}