C Program to find Matrix addition,Subtraction and trace.

Write a C program to read two matrices A (MxN) and B(MxN) and perform addition ,subtraction of A and B, and Find the trace of the resultant matrix. Output the given matrix, their sum or Differences and the trace. Read more about C Programming Language .

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#include <stdio.h>
#include <conio.h>

void main()
{
int A[10][10], B[10][10], sumat[10][10], diffmat[10][10];
int i, j, M,N, option;

void trace (int arr[][10], int M, int N);

clrscr();

printf("Enter the order of the matrice A and Bn");
scanf("%d %d", &M, &N);

printf("Enter the elements of matrix An");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
scanf("%d",&A[i][j]);
}
}

printf("MATRIX A isn");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
printf("%3d",A[i][j]);
}
printf("n");
}

printf("Enter the elements of matrix Bn");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
scanf("%d",&B[i][j]);
}
}

printf("MATRIX B isn");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
printf("%3d",B[i][j]);
}
printf("n");
}

printf("Enter your option: 1 for Addition and 2 for Subtractionn");
scanf("%d",&option);

switch (option)
{
case 1: for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
sumat[i][j] = A[i][j] + B[i][j];
}
}

printf("Sum matrix isn");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
printf("%3d",sumat[i][j]) ;
}
printf("n");
}

trace (sumat, M, N);
break;

case 2:for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
diffmat[i][j] = A[i][j] - B[i][j];
}
}

printf("Difference matrix isn");
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
printf("%3d",diffmat[i][j]) ;
}
printf("n");
}

trace (diffmat, M, N);
break;
}

} /* End of main() */

/*Function to find the trace of a given matrix and print it*/

void trace (int arr[][10], int M, int N)
{
int i, j, trace = 0;
for(i=0; i<M; i++)
{
for(j=0; j<N; j++)
{
if (i==j)
{
trace = trace + arr[i][j];
}
}
}
printf ("Trace of the resultant matrix is = %dn", trace);

}
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