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Type your answervoid main()

{

int **a,**b,**c;

//int c[3][3];

int a_r,a_c,b_r,b_c;

int i,j,k;

clrscr();

again:

printf("\nenter rows and columns for matrix one:");

scanf("d",&a_r,&a_c);

printf("\nenter rows and columns for matrix two:");

scanf("d",&b_r,&b_c);

if(a_c!=b_r )

{

printf("\ncan not multiply");

goto again;

}

/* allocate memory for matrix one */

a=(int **) malloc(sizeof(int *),a_r);

for( i=0;i {

a[i]=(int *) malloc(sizeof(int*)*a_c);

}

/* allocate memory for matrix two */

b=(int **) malloc(sizeof(int)*b_r);

for( i=0;i {

b[i]=(int *) malloc(sizeof(int*)*b_c);

}

/* allocate memory for sum matrix */

c=(int **) malloc(sizeof(int *)*a_r);

for( i=0;i {

c[i]=(int *) malloc(sizeof(int)*b_c);

}

printf("\n enter matrix one %d by %d\n",a_r,a_c);

for(i=0;i {

for(j=0;j {

scanf("%d",&a[i][j]);

}

}

printf("\n enter matrix two %d by %d\n",b_r,b_c);

for(i=0;i {

for(j=0;j {

scanf("%d",&b[i][j]);

}

}

/*initialize product matrix */

for(i=0;i {

for(j=0;j {

c[i][j]=0;

}

}

/* multiply matrix one and matrix two */

for(i=0;i {

for(j=0;j {

for(k=0;k {

c[i][j]=c[i][j]+a[i][k]*b[k][j];

}

}

}

/* display result */

printf("\n Product of matrix one and two is\n");

for(i=0;i {

for(j=0;j {

printf("%d\t",c[i][j]);

}

printf("\n");

}

/*free memory*/

for(i=0;i {

free(a[i]);

}

free(a);

for(i=0;i {

free(b[i]);

}

free(b);

for(i=0;i {

free(c[i]);

}

free(c);

printf("\npress any key");

getch();

}

I would suggest you go to

http://code.freefeast.info/matrix-multiplication-using-pointers-in-c-dynamic-matrix-multiplication-in-c/

It has got a well formatted and commented code for this problem
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11y ago

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