Computer Programming C Laboratory: Arrays C Programs
C Program to illustrate Matrix Multiplication (Two Dimensional Array)
Initialising a Two Dimensional Array - Arrays C Program
C Program to illustrate Matrix Multiplication
* Program for matrix multiplication */
#include <stdio.h>
main()
{
int a[5][5], b[5][5],c[5][5],r1, r2, c1, c2, i,j,k;
Step 1 :
printf("\nEnter the size of the matrix A....");
scanf("%d %d", &rl, & cl);
printf("\nEnter the size of the matrix B....");
scanf("%d %d", &r2, & c2);
if(c1= =r2)
goto step2;
else
printf("\nMultiplication is not possible");
goto stepl;
Step2 :
printf("\nEnter matrix A elements...\n");
for(i=0;i<r1;i++)
{
for(j=0;j<cl;j++)
scanf("%d", &a[i][j]);
} /* for */
printf("\nEnter matrix B elements...\n");
for(i=0;i<r2;i++)
{
scanf("%d", &b[i][j]);
} /* for */
for(i=0;i<rl;i++)
{
for(j=0;j<c1;j++)
{
c[i][j]=0;
for(k=0;k<c1;k++)
c[i][j]=c[i][j]+a[i][k]*b[k][j];
} /* for */
printf("\nThe resultant matrix is ....\n");
for(i=0;i<rl;i++)
for(j=0;j<c1;j++)
printf("%d\t",c[i][j]);
printf("\n");
} /* for */
} /* main */
OUTPUT:
Enter the size of the matrix A....3 3
Enter the size of the matrix B....2 2
Multiplication is not possible
Enter the size of the matrix A....3 3
Enter the size of the matrix B....3 3
Enter matrix A elements...
2 2 2 2 2 2 2 2 2
Enter matrix B elements...
3 3 3 3 3 3 3 3 3
The resultant matrix is
18 18 18
18 18 18
18 18 18
EXPLANATION: The program reads size of the matrix, then checks rows and column are equal or not. If rows and columns are equal further execution starts, else it prints multiplication is not possible. The i and j for loop is used to get both A and B matrix. The another i and j for loop is used to calculate the matrix multiplication and final i and j for loop is used to print the resultant matrix.
Computer Programming C Laboratory: Arrays C Programs : Tag: C Programming : - C Program to illustrate Matrix Multiplication (Two Dimensional Array)
Computer Programming C Laboratory: Arrays C Programs
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