Function of Matrix Addition ,Sub and Multiplication in C++ using classes

Functions  of Matrix using C++ Classes

#include<iostream>
using namespace std;
class matrics
{
private:
int rows;
int columns;
int m[100][100];
public:
matrics();
matrics add(matrics);
matrics sub(matrics);
matrics mul(matrics);
};


matrics matrics::add(matrics b)
{
matrics r;
int i,j;
for(i=0;i<rows;i++)
for(j=0;j<columns;j++)
{
r.m[i][j]= m[i][j]+b.m[i][j];
}
r.rows=rows;
r.columns=columns;
return r;
}
matrics matrics::sub(matrics b)
{
matrics r;
int i,j;
for(i=0;i<rows;i++)
for(j=0;j<columns;j++)
{
r.m[i][j]= m[i][j]-b.m[i][j];
}
r.rows=rows;
r.columns=columns;
return r;
}
matrics matrics::mul(matrics b)
{
matrics r;
for(int i=0;i<rows;i++)
{
for(int j=0;j<b.columns;j++)
{
r.m[i][j]=0;
        for(int k=0;k<rows;k++)
{
r.m[i][j]=r.m[i][j]+(m[i][k] * b.m[k][j]);
}
}
}
r.rows=rows;
r.columns=b.columns;

return r;
}

Write the Classes of Matrix in C++

You will implement a matrix calculator. Design a class matrix which implements the basic functionality of mathematical objects Matrix. Use static two dimensional array of floats to store the elements of the matrix. You can assume that no matrix would have dimensions more than 10x10. Define the following functions for the users of matrix calculator

These are the classes of Matrix and we have define every thing in function and make easier for C++ students. We have define default constructor with name of "matrix()" and over loaded constructor.

#include<iostream>

using  namespace std;
class matrix{
private:
int row;
int col;
int a[10][10];
public:
matrix();
matrix(int r,int c);
matrix add(matrix m);
matrix mul(matrix m);
matrix sub(matrix m);
bool notequal(matrix m);
void mulfloat(int i,int,float j);
void trans();
void inverse();
void input();
void output();
void swape(int i,int j);
};
matrix::matrix()
{
row=10;
col=10;


}
matrix::matrix(int r,int c)
{
row=r;
col=c;


}
matrix matrix::add(matrix m)
{ matrix d;
int i,j,c;
if(row==m.row&&col==m.col)
{
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
d.a[i][j]=a[i][j]+m.a[i][j];

}
}
d.row=row;
d.col=col;
}

return d;



}
matrix matrix::sub(matrix m)
{ matrix d;
int i,j,c;
if(row==m.row&&col==m.col)
{
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
d.a[i][j]=a[i][j]-m.a[i][j];

}
}
d.row=row;
d.col=col;
}
return d;

}
matrix matrix::mul(matrix m)
{
matrix d;

for(int i=0;i<row;i++)
{
for(int j=0;j<m.col;j++)
{
d.a[i][j]=0;
        for(int k=0;k<row;k++)
{
d.a[i][j]=d.a[i][j]+(a[i][k] * m.a[k][j]);
}

}

}
d.row=row;
d.col=m.col;

return d;
}
void matrix::trans()
{


int temp;
int i;
int j=0;
for(i=0;i<row;i++)
{
for(j=i;j<col;j++)
{
temp=a[i][j];
              a[i][j]=a[j][i];
a[j][i]=temp;


}
}

}
bool matrix::notequal(matrix m)
{

if(col!=m.row)
return false;
else
return true;



}
void matrix::swape(int i,int j)
{
int temp,k;
for(k=0;k<col;k++)
{
temp=a[i][k];
a[i][k]=a[j][k];
a[j][k]=temp;
}
}
void matrix::mulfloat(int i,int j,float f)
{
int k;
for(k=0;k<col;k++)
a[i][k]*=f;
for(k=0;k<col;k++)
a[j][k]+=a[i][k];
}
void matrix::input()
{
int i,j;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
cin>>a[i][j];
}
}
void matrix::output()
{
int i,j;
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)

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

cout<<"\n";
}
}
void main()
{
int k,l,x;
cout<<"\t*********WelCOME TO THE MATRIX CALCULATOR***********\n\n\n";
cout<<"Enter the Size of Rows and COl\n\n ";
cin>>k>>l;
matrix a(k,k),b(k,l),c;
cout<<"Press the following keyword which is shown in the screen :\n1 Addition\n2 subtraction\n3 Multiplication\n4 Transpose\n5 Inverse\n\n";
cin>>x;
if(x==1)
{
cout<<"Enter the matrix A\n";
a.input();
cout<<"Enter the matrix B\n";
b.input();

cout<<"Matrix Addition\n";
c=a.add(b);
c.output();
}
   if(x==2)
{
cout<<"Enter the matrix A\n";
a.input();
cout<<"Enter the matrix B\n";
b.input();

cout<<"Matrix Subtraction\n";
c=a.sub(b);
c.output();
}
if(x==3)
{
cout<<"Enter the matrix A\n";
a.input();
cout<<"Enter the matrix B\n";
b.input();
cout<<"Matrix Multi\n";
c=a.mul(b);
c.output();
}
if(x==4)
{
cout<<"Enter the matrix A\n";
a.input();
cout<<"Enter the matrix B\n";
b.input();
cout<<"Given Matrix \n\n";

a.output();
a.trans();
cout<<"resultant Matrix:\n\n";
a.output();

}

system("pause");



}

Credit inquiry program, which tell about bank balance of customer and diiferent functions

/* Fig. 11.8: fig11_08.c
  Credit inquiry program */
#include <stdio.h>

/* function main begins program execution */
int main( void )
{
  int request;     /* request number */
  int account;     /* account number */
  double balance;  /* account balance */
  char name[ 30 ]; /* account name */
  FILE *cfPtr;     /* clients.dat file pointer */

  /* fopen opens the file; exits program if file cannot be opened */
  if ( ( cfPtr = fopen( "clients.dat", "r" ) ) == NULL ) {
     printf( "File could not be opened\n" );
  } /* end if */
  else {
   
     /* display request options */
     printf( "Enter request\n"
        " 1 - List accounts with zero balances\n"
        " 2 - List accounts with credit balances\n"
        " 3 - List accounts with debit balances\n"
        " 4 - End of run\n? " );
     scanf( "%d", &request );
     /* process user's request */
     while ( request != 4 ) {

        /* read account, name and balance from file */      
        fscanf( cfPtr, "%d%s%lf", &account, name, &balance );

        switch ( request ) {

           case 1:
              printf( "\nAccounts with zero balances:\n" );

              /* read file contents (until eof) */
              while ( !feof( cfPtr ) ) {

                 if ( balance == 0 ) {
                    printf( "%-10d%-13s%7.2f\n",
                       account, name, balance );
                 } /* end if */

                 /* read account, name and balance from file */
                 fscanf( cfPtr, "%d%s%lf",                    
                    &account, name, &balance );              
              } /* end while */

              break;
              printf( "\nAccounts with credit balances:\n" );

              /* read file contents (until eof) */
              while ( !feof( cfPtr ) ) {

                 if ( balance < 0 ) {
                    printf( "%-10d%-13s%7.2f\n",
                       account, name, balance );
                 } /* end if */

                 /* read account, name and balance from file */
                 fscanf( cfPtr, "%d%s%lf",                    
                    &account, name, &balance );              
              } /* end while */

              break;

           case 3:
              printf( "\nAccounts with debit balances:\n" );

              /* read file contents (until eof) */
              while ( !feof( cfPtr ) ) {

                 if ( balance > 0 ) {
                    printf( "%-10d%-13s%7.2f\n",
                       account, name, balance );
                 } /* end if */
                 /* read account, name and balance from file */
                 fscanf( cfPtr, "%d%s%lf",                    
                    &account, name, &balance );              
              } /* end while */

              break;          
         
        } /* end switch */

        rewind( cfPtr ); /* return cfPtr to beginning of file */

        printf( "\n? " );
        scanf( "%d", &request );
     } /* end while */

     printf( "End of run.\n" );
     fclose( cfPtr ); /* fclose closes the file */
  } /* end else */

  return 0; /* indicates successful termination */

 } /* end main */

Wrrite a program which event become earlier

You are to write a program to process the timings of events. The program should have following structures.

Date is defined as a structure with three fields of type integer i.e. day, month and year.

Time is defined as a structure with three fields of type integer i.e. hour, minute and second.

Event is also defined as a structure with three fields. One of the fields is venue of type integer. Whereas other two fields are the variables of type DateType and TimeType. 

#include<stdio.h>

#include<stdlib.h>

struct time

{

int hour;

int min;

int sec;

};

struct date

{

int day;

int month;

int year;

};

struct even

{

int venue;

struct time t;

struct date d;

};

void inputtime(struct time *t);

void inputdate(struct date *d);

void inputeven( struct even *e1);

int Earlierevevt(struct even *e1 , struct even *e2);

void print(even *e1);

void main()

{

struct even s[10] , temp;

int i,j;

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

{

inputeven(&s[i]);

}

for(i=0;i<2;i++)

{

for(j=i+1;j<3;j++)

if(Earlierevevt(&s[i],&s[j])==1)

{

temp=s[i];

s[i]=s[j];

s[j]=temp;

}

}

system("cls");

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

print(&s[i]);

system("pause");

}

void inputtime(struct time *t)

{

printf("enter hour\n");

scanf("%d",&t->hour);

printf("enter min\n");

scanf("%d",&t->min);

printf("enter second\n");

scanf("%d",&t->sec);

}

void inputdate(struct date *d)

{

printf("enter date\n");

scanf("%d",&d->day);

printf("enter month\n");

scanf("%d",&d->month);

printf("enter year\n");

scanf("%d",&d->year);

}

void inputeven( struct even *e1)

{

printf("enter the venue of event\n");

scanf("%d",&e1->venue);

printf("enter the date of event\n");

inputdate(&(e1->d));

printf("enter the time of event\n");

inputtime(&(e1->t));

}

int Earlierevevt(struct even *e1 , struct even *e2)

{

if(e1->d.year != e2->d.year)

{

if(e1->d.year > e2->d.year)

return 1;

else{}

}

if(e1->d.month != e2->d.month)

{

if(e1->d.month > e2->d.month)

return 1;

else{}

}

if(e1->d.day != e2->d.day)

{

if(e1->d.day > e2->d.day)

return 1;

else{}

}

if(e1->t.hour != e2->t.hour)

{

if(e1->t.hour > e2->t.hour)

return 1;

else{}

}

if(e1->t.min != e2->t.min)

{

if(e1->t.min > e2->t.min)

return 1;

else{}

}

if(e1->t.sec != e2->t.sec)

{

if(e1->t.sec > e2->t.sec)

return 1;

else{}

}

return 0;

}

void print(even *e1)

{

printf("Venue %d\n",e1->venue);

printf("Date= %d/%d/%d\n",e1->d.day,e1->d.month,e1->d.year);

printf("Time= %d:%d:%d\n",e1->t.hour,e1->t.min,e1->t.sec);

}

Add time t1+t2 in c code

time AddTime(time t1, time t2)

this function takes two variables of type time and add those times and return the resultant time.

e.g if t1 = 23:45:50 and t2 = 04:20: 25 then resultant time should be 04:06:15. Note that seconds and minutes are rounded to 60 whereas hour is rounded to 24.

#include<stdio.h>

#include<stdlib.h>

struct time {

    int hour;

    int minute;

    int sec;

};

struct time t1,t2;

struct time add_time(struct time t1,struct time t2){

    struct time add;

    add.hour   = t1.hour + t2.hour;

    add.sec    = t1.sec + t2.sec;

    add.minute = t1.minute + t2.minute;

    if(add.hour>23)

    {

        add.hour=add.hour-24;

    }

     if(add.minute>59)

    {

        add.minute=add.minute-60;

    }

     if(add.sec>59)

    {

        add.sec=add.sec-60;

    }

    return add;

}

void main()

{

    struct time sum;

    printf("enter the the time 1:\n");

    printf("Enter hours, minutes and seconds respectively:\n ");

    scanf("%d%d%d",&t1.hour,&t1.minute,&t1.sec);

    printf("enter the the time 2\n\n");

    printf("Enter hours, minutes and seconds respectively:\n ");

    scanf("%d%d%d",&t2.hour,&t2.minute,&t2.sec);

    sum=add_time(t1,t2);

    printf("t1+t2  =   %d : %d : %d\n\n\n",sum.hour,sum.minute,sum.sec);

system("pause");

}

Add complex numbers,suntract complex numbers and multiply complex numbers and return the resultant complex number

A complex number is represented by two parts, real and imaginary part. Consider the complex number ‘ 

a + bi’ where ‘a’ is the real part and ‘b’ is the imaginary part. Also  i = 1 Consider the following struct:

#include<stdio.h>

//#include<math.h>

struct comp {

    float real;

    float img;

};

struct comp a1,a2;

struct comp sum_complex(struct comp a1,struct comp a2)

{

    struct comp sum;

    sum.real=a1.real+a2.real;

    sum.img=a1.img+a2.img;

return sum;

}

struct comp a1,a2;

struct comp multiply_complex(struct comp a1,struct comp a2)

{

    struct comp multiply;

    multiply.real=a1.real*a2.real;

    multiply.img=a1.img*a2.img;

return multiply;

}

struct comp a1,a2;

struct comp subtraction_complex(struct comp a1,struct comp a2)

{

    struct comp subtraction;

    subtraction.real=a1.real - a2.real;

    subtraction.img=a1.img - a2.img;

return subtraction;

}

void main(){

    struct comp add;

    struct comp multi;

    struct comp sub;

    printf("enter the complex no 1\n");

    scanf("%f",&a1.real);

    scanf("%f",&a1.img);

    printf("enter the complex no 2\n");

    scanf("%f",&a2.real);

    scanf("%f",&a2.img);

    add = sum_complex(a1,a2);

    sub =subtraction_complex(a1,a2);

    multi= multiply_complex(a1,a2);

    printf("The sum is            =   (%.2f) +(%.2f)i\n\n\n",add.real,add.img);

    printf("The subtraction  is   =   (%.2f) +(%.2f)i\n\n\n",sub.real,sub.img);

    printf("The multiplication is =   (%.2f) + (%.2f)i\n\n\n",multi.real,multi.img);

}

Input

This function should take a pointer of type complex as parameter and take input for real and imaginary parts of the complex number from the user.

Add

This function takes two parameters of type complex, perform complex number addition and return the resultant complex number. If we have two complex numbers (a+bi) and (c+di) then

(a+ib) + (c+id) = (a+c) + (b+d)i

e.g (2 + (-6)i) + (-4+2i) = -2 – 4i

            Subtract

This function takes two parameters of type complex, perform complex number subtraction and return the resultant complex number. If we have two complex numbers (a+ib) and (c+id) then

(a+ib) - (c+id) = (a-c) + (b-d)i

e.g (2 + (-6)i) - (-4+2i) = 6 – 8i

            Multiply

This function takes two parameters of type complex, perform complex number multiplication and return the resultant complex number. If we have two complex numbers (a+ib) and (c+id) then

(a+ib)*(c+id) = (ac-bd) + (bc+ad)i

e.g (2+6i) + (-4+2i) = (-8-12) + (-24+4)i

                                = -20 + (-20)i

Simple Adding two matrixes by for loop in C

//simple adding two matrixes

#include<stdio.h>
void main()
{
int a[3][3],r[3][3],c[3][3],i,j,temp=0;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
        printf("enter the values for A matrics\n");
    scanf("%d",&a[i][j]);
        printf("enter the values for B matrics\n");
    scanf("%d",&r[i][j]);
        }
    }
    printf("\n");
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
            printf("%d\t",a[i][j]);
            printf("+\t");
        for(j=0;j<3;j++)
            printf("%d\t",r[i][j]);
    printf("\n");
    }
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
    c[i][j]=a[i][j]+r[i][j];
    }
    printf("sum of above matices\n");
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
    printf("%d\t",c[i][j]);
    printf("\n");
    }



}

Sort the numbers in ascending order

#include<stdio.h>
void main()
{
    int a[10],i,j,temp;
    printf("Enter the marks of 10 students!!");
    for(i=0;i<10;i++)
    {
        scanf("%d",&a[i]);
    }
    for(i=0;i<10;i++)
    {
        for(j=0;j<9;j++)
        {
            if(a[i]>a[j]){
            temp=a[i];
            a[i]=a[j];
            a[j]=temp;}
        }

    }
    for(i=0;i<10;i++)
    printf(" %d   ",a[i]);

}