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88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* Matrix multiplication - Develop a function that takes as arguments 3 matrices a , b , c and 3 integer variables l,m,n. Calculate product of a and b and store the result in c. Also write a main routine which will test whether the input matrices a and b are conformal to multiplication - May 2013 */
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#include <stdio.h>
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#include <conio.h>
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void read(int x[ ][10], int nr, int nc) ;
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void multiply(int a[ ][10], int b[ ][10], int c[ ][10], int l, int m, int n) ;
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void show(int y[ ][10], int nr, int nc) ;
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void main()
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{
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int a[10][10], b[10][10], c[10][10], nra, nca, nrb, ncb ;
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clrscr();
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printf("Enter the number of rows and columns of first matrix: ");
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scanf("%d %d", &nra, &nca) ;
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printf("Enter the number of rows and columns of second matrix: ");
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scanf("%d %d", &nrb, &ncb) ;
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if(nca==nrb)
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{
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printf("Enter elements of first matrix row-wise: \n");
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read(a,nra,nca);
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printf("Enter elements of second matrix row-wise: \n");
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read(b,nrb,ncb);
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multiply(a,b,c,nra,nca,ncb);
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printf("Result of matrix multiplication is: \n");
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show(c,nra,ncb);
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}
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else
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printf("Two given Matrices do not conform to multiplication");
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getch();
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}
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void read(int x[ ][10], int nr, int nc)
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{
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int r, c ;
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for(r=0 ; r<nr ; r++)
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for(c=0 ; c<nc ; c++)
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scanf("%d", &x[r][c]) ;
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}
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void multiply(int a[ ][10], int b[ ][10], int c[ ][10], int l, int m, int n)
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{
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int i, j, k ;
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for(i=0 ; i<l ; i++)
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for(j=0 ; j<n ; j++)
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{
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c[i][j]=0 ;
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for(k=0 ; k<m ; k++)
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c[i][j]=c[i][j]+a[i][k]*b[k][j] ;
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}
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}
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void show(int y[ ][10], int nr, int nc)
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{
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int r, c ;
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for(r=0 ; r<nr ; r++)
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{
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for(c=0 ; c<nc ; c++)
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printf("%d ", y[r][c]) ;
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printf("\n") ;
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}
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}
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/*
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Output1:
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Enter the number of rows and columns of first matrix: 2 3
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Enter the number of rows and columns of second matrix: 3 2
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Enter elements of first matrix:
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1 2 4
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3 5 6
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Enter elements of second matrix:
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2 5
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1 6
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4 3
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Result of matrix multiplication is:
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20 29
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35 63
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Output2:
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Enter the number of rows and columns of first matrix: 2 3
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Enter the number of rows and columns of second matrix: 2 3
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Matrices A and B do not conform to multiplication
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*/
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