C Program to obtain the trace of a given square matrix of order m x m

Write a function to obtain the trace of a given square matrix of order m x m
m. (Trace of a matrix is defined as the sum of leading diagonal elements of
the matrix. )
#include
#include
void main()
{
int a[10][10],m,n,i,j,sum=0;
clrscr();
printf("\nEnter number of rows");
scanf("%d",&m);
printf("\nEnter number of columns");
scanf("%d",&n);
if(m==n)
{
printf("Enter values for matrix");
for(i=0;i {
for(j=0;j {
printf("\na[%d][%d] value",i,j);
scanf("%d",&a[i][j]);
}
}
printf("\nMatrix\n");
for(i=0;i {
for(j=0;j {
printf("%d\t",a[i][j]);
}
printf("\n");
}

for(i=0;i {
sum+=a[i][i];
}
printf("\nSum of diagonal elements %d",sum);

}
else
{
printf("\nSORRY!!!SQUARE MATRIX REQUIRED!!!");
}
getch();
}

/*Output
Enter number of rows3

Enter number of columns3
Enter values for matrix
a[0][0] value1

a[0][1] value2

a[0][2] value3

a[1][0] value4

a[1][1] value5

a[1][2] value6

a[2][0] value7

a[2][1] value8

a[2][2] value9

Matrix
1 2 3
4 5 6
7 8 9

Sum of diagonal elements 15
*/