برنامه ضرب دو ماتریس با استفاده از ارسال ماتریس به تابع در زبان سی پلاس پلاس
جمعه, ۱۶ مهر ۱۳۹۵، ۰۴:۳۳ ق.ظ
gameover.blog.ir
#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 and columns for first matrix: ";
cin >> r1 >> c1;
cout << "Enter rows and columns for second matrix: ";
cin >> r2 >> c2;
/* If colum of first matrix in not equal to row of second matrix, asking user to enter the size of matrix again. */
while (c1!=r2)
{
cout << "Error! column of first matrix not equal to row of second." << endl;
cout << "Enter rows and columns for first matrix: ";
cin >> r1 >> c1;
cout << "Enter rows and columns for second matrix: ";
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 << "Enter elements of matrix 1:" << endl;
for(i=0; i<r1; ++i)
for(j=0; j<c1; ++j)
{
cout << "Enter element a" << i+1 << j+1 << " : ";
cin >> a[i][j];
}
cout << endl << "Enter elements of matrix 2:" << endl;
for(i=0; i<r2; ++i)
for(j=0; j<c2; ++j)
{
cout << "Enter 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;
/* Initializing elements of matrix mult to 0.*/
for(i=0; i<r1; ++i)
for(j=0; j<c2; ++j)
{
mult[i][j]=0;
}
/* Multiplying matrix a and b and storing in array mult. */
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;
}
}
Output
Enter rows and column for first matrix: 3 2 Enter rows and column for second matrix: 3 2 Error! column of first matrix not equal to row of second. Enter rows and column for first matrix: 2 3 Enter rows and column for second matrix: 3 2 Enter elements of matrix 1: Enter elements a11: 3 Enter elements a12: -2 Enter elements a13: 5 Enter elements a21: 3 Enter elements a22: 0 Enter elements a23: 4 Enter elements of matrix 2: Enter elements b11: 2 Enter elements b12: 3 Enter elements b21: -9 Enter elements b22: 0 Enter elements b31: 0 Enter elements b32: 4 Output Matrix: 24 29 6 25
۹۵/۰۷/۱۶