FORTRAN PROGRAM FOR PRODUCT OF TWO MATRICES

Program 01 

C PROGRAM FOR PRODUCT OF TWO MATRICES

DIMENSION MAT1(5,5),MAT2(5,5),C(5,5)

INTEGER MAT1,MAT2,C,R1,C1,R2,C2

WRITE(*,*)'ENTER THE ORDER OF FIRST MATRIX'

READ(*,*)R1,C1

WRITE(*,*)'ENTER THE ORDER OF SECOND MATRIX'

READ(*,*)R2,C2

IF(C1.NE.R2)THEN

WRITE(*,*)'PRODUCT NOT POSSIBLE,ENTER ORDERS ONCE AGAIN'

GOTO 11

ENDIF

WRITE(*,*)'ENTER THE ELEMENTS OF FIRST MATRIX'

READ(*,*)((MAT1(I,J),J=1,C1),I=1,R1)

WRITE(*,*)'ENTER THE ELEMENTS OF SECOND MATRIX'

READ(*,*)((MAT2(I,J),J=1,C2),I=1,R2)

DO 10 I=1,R1

DO 10 J=1,C2

C(I,J)=0

DO 10 K=1,C1

C(I,J)=C(I,J)+MAT1(I,K)*MAT2(K,J)

10 CONTINUE

WRITE(*,*)'PRODUCT OF ABOVE MATRICES IS'

DO 20 I=1,R1

WRITE(*,*)(C(I,J),J=1,C2)

20 CONTINUE

11 STOP

End

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Program 02

c A FORTRAN program to find out the product of two matrices

c Designed by ...

dimension mat1(5,5),mat2(5,5),c(5,5)

integer mat1,mat2,c,r1,c1,r2,c2

99 write(*,*)'This is program to find out the product of two given ma

     +trices'

write(*,15)

15 format(/)

write(*,*)'Enter the order of first matrix'

read(*,*)r1,c1

write(*,*)'Enter the order of second matrix'

read(*,*)r2,c2

if(c1.ne.r2)then

write(*,*)'Product is not possible'

write(*,*)'Reason=> column number of the first matrix is not equal

     +to the row number of second'

goto 11

endif

write(*,*)'Enter the element of first matrix'

read(*,*)((mat1(i,j),j=1,c1),i=1,r1)

write(*,*)'Enter the elements of second matrix'

read(*,*)((mat2(i,j),j=1,c2),i=1,r2)

do 10 i=1,r1

do 10 j=1,c2

c(i,j)=0

do 10 k=1,c1

c(i,j)=c(i,j)+mat1(i,k)*mat2(k,j)

10 continue

write(*,*)'Product is'

do 20 i=1,r1

write(*,*)(c(i,j),j=1,c2)

20 continue

11 write(*,*)'Would you like to multiply another pair of matrices?'

write(*,*)'1) YES   ....PRESS 1'

write(*,*)'2) NO    ....PRESS 2'

read(*,*)n

if(n.eq.1) then

goto 99

endif

End