Skip to main content

Introduction To C++ Programming - Part 8.

C++ Program To Multiply Two Matrices Using Multi-dimensional Arrays
#include <iostream>
using namespace std;

int main() {
int a[10][10], b[10][10], mult[10][10], r1, c1, r2, c2, i, j, k;

cout << "Enter No. Of Rows & Columns For First Matrix:\n";
cin >> r1 >> c1;
cout << "\nEnter No. Of Rows & Columns For Second Matrix:\n";
cin >> r2 >> c2;

while (c1!=r2) {
cout << "\nError! Column Of First Matrix Is Not Equal To Row Of Second Matrix.\n";

cout << "\nEnter No. Of Rows & Columns For First Matrix:\n";
cin >> r1 >> c1;
cout << "\nEnter No. Of Rows & Columns For Second Matrix:\n";
cin >> r2 >> c2;
}
cout << endl << "\nEnter The Elements Of Matrix 1:" << endl;
for(i=0; i<r1; ++i)
for(j=0; j<c1; ++j) {
cout << "Enter The Element a" << "[" << i+1 << j+1 << "]" << " : ";
cin >> a[i][j];
}
cout << endl << "\nEnter The Elements Of Matrix 2:" << endl;
for(i=0; i<r2; ++i)

for(j=0; j<c2; ++j) {
cout << "Enter The Element b" << "[" << i+1 << j+1 << "]" << " : ";
cin >> b[i][j];
}
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j) {
mult[i][j]=0;
}

for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
for(k=0; k<c1; ++k) {
mult[i][j]+=a[i][k]*b[k][j];
}
cout << endl << "\nOutput Matrix: " << endl;
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j) {
cout << " " << mult[i][j];

if(j==c2-1)
cout << endl;
}
return 0;
}

C++ Program To Multiply Two Matrices Using Function
#include <iostream>
using namespace std;

void take_data(int a[][10], int b[][10], int r1,int c1, int r2, int c2);
void multiplication(int a[][10],int b[][10],int mult[][10],int r1,int c1,int r2,int c2);
void display(int mult[][10], int r1, int c2);

int main() {
int a[10][10], b[10][10], mult[10][10], r1, c1, r2, c2, i, j, k;

cout << "Enter Rows & Columns For First Matrix: " << endl;
cin >> r1 >> c1;
cout << "\nEnter Rows & Columns For Second Matrix: " << endl;
cin >> r2 >> c2;

while (c1!=r2) {
cout << "\nError! Column Of First Matrix Is Not Equal To Row Of Second Matrix.\n";

cout << "\nEnter No. Of Rows & Columns For First Matrix:\n";
cin >> r1 >> c1;
cout << "\nEnter No. Of Rows & Columns For Second Matrix:\n";
cin >> r2 >> c2;
}

take_data(a,b,r1,c1,r2,c2);  /* Function to take matrices data */
multiplication(a,b,mult,r1,c1,r2,c2); /* Function to multiply two matrices. */
display(mult,r1,c2); /* Function to display resultant matrix after multiplication. */
return 0;
}

void take_data(int a[][10], int b[][10], int r1,int c1, int r2, int c2) {
int i,j;

cout << endl << "\nEnter The Elements Of Matrix 1:" << endl;
for(i=0; i<r1; ++i)

for(j=0; j<c1; ++j) {
cout << "Enter The Element a" << "[" << i+1 << j+1 << "]" << " : ";
cin >> a[i][j];
}
cout << endl << "\nEnter The Elements Of Matrix 2:" << endl;
for(i=0; i<r2; ++i)

for(j=0; j<c2; ++j) {
cout << "Enter The Element b" << "[" << i+1 << j+1 << "]" << " : ";
cin >> b[i][j];
}}

void multiplication(int a[][10],int b[][10],int mult[][10],int r1,int c1,int r2,int c2) {
int i,j,k;

for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j) {
mult[i][j]=0;
}

for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
for(k=0; k<c1; ++k) {
mult[i][j]+=a[i][k]*b[k][j];
}}

void display(int mult[][10], int r1, int c2) {
int i, j;

cout << endl << "Output Matrix: " << endl;
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j) {
cout << " " << mult[i][j];

if(j==c2-1)
cout << endl;
}}
Labels:

Popular posts from this blog

Screenshots from Windows 1.01

Windows 1.0 is a graphical personal computer operating environment developed by Microsoft, released on November 20, 1985, as the first version of the Microsoft Windows line. Version 1.01 , also released in 1985, was the first point-release after Windows 1.00.   Screenshots from Windows 1.01: ⇰ Desktop  First Run Empty Desktop Desktop With Applications ⇰  Office Applications Notepad Text Editor Calculator Calendar Clock Address Book ⇰  Multimedia Applications Media player, CD player, Volume level, and Sound: This GUI doesn’t have these features. ⇰  Networking Applications Terminal Phone Dialer: This GUI doesn’t have this feature. ⇰  Internet Applications Browser, and Mail: This GUI doesn’t have these features. ⇰  Accessibility Applications Keyboard Map:  This GUI doesn’t have this feature. ⇰  Settings Desktop themes,  Display,  S...
Read more

C Program To Check Whether A Number Is Palindrome Or Not.

This program takes an integer from user and the integer is reversed. If the reversed integer is equal to the integer entered by user then that number is a palindrome. If not that number is not a palindrome.   #include <stdio.h> int main()  { int num, temp, remainder, reverse = 0; printf("Enter an integer: "); scanf("%d", &num); /*  original number is stored at temp */ temp = num; while (num > 0)  { remainder = num % 10; reverse = reverse * 10 + remainder; num /= 10;   }
Read more

C++ Program To Implement Casino Number Guessing Game.

#include <iostream> #include <string> #include <cstdlib> #include <ctime> using namespace std; void drawLine(int n, char symbol); void rules(); int main() { string playerName; int amount; int bettingAmount; int guess; int dice; char choice; srand(time(0)); drawLine(70,'_'); cout << "\n\n\n\t\tCASINO GAME\n\n\n\n"; drawLine(70,'_'); cout << "\n\nEnter Your Name : "; getline(cin, playerName); cout << "\n\nEnter Deposit Amount To Play Game : $"; cin >> amount;
Read more

C Program To Convert Natural Numbers To Roman Numerals.

Roman Number System of representing numbers devised by the ancient Romans. The numbers are formed by combinations of the symbols I, V, X, L, C, D, and M, standing, respectively, for 1, 5, 10, 50, 100, 500, and 1,000 in the Hindu-Arabic numeral system. Natural numbers mean no negative numbers and no fractions, i.e. the whole numbers from 1 upwards: 1, 2, 3, and so on. Here is source code of the C program to convert natural numbers to Roman Numerals. It compiles and runs on any operating system. #include <stdio.h> void predigit(char num1, char num2); void postdigit(char c, int n); char romanval[1000]; int i = 0; int main() { int j; long number; printf("Enter any natural number: "); scanf("%d", &number);
Read more