Матрицы в Turbo C.

#include <stdio.h>
#include <stdlib.h>
const int n=2;
int mA[3][3], mB[3][3], mC[3][3], matPR[3][3], mat1[3][3],
mat2[3][3],mSUM[3][3], mRazn[3][3];
int a,b,k,m,sum,proizv;
void pr (int z, int p[3][3])
{for (a=0; a<=n; a++)
for (b=0; b<=n; b++)
{proizv=0;
proizv=z*p[a][b];
matPR [a][b]=proizv;
}
}
void summ(int f[3][3], int h[3][3])
{
for (a=0; a<=n; a++)
for (b=0; b<=n; b++)
mSUM[a][b]=f[a][b]+h[a][b];
}
void razn(int u[3][3], int v[3][3])
{
for (a=0; a<=n; a++)
for (b=0; b<=n; b++)
mRazn[a][b]=u[a][b]-v[a][b];
}
void create(int x[3][3])
{int T=0;
printf("Enter elements \n");
for (a=0; a<=n; a++)
for (b=0; b<=n; b++)
{scanf("%3i", &T);
x[a][b]=T;
}
}
void print(int y[3][3])
{for (a=0; a<=2; a++)
{for (b=0; b<=2; b++)
printf("%3i",y[a][b]);
printf("\n");
}
printf ("\n");
}
copymat(int in[3][3], int out[3][3])
{
for (a=0; a<=2; a++)
for (b=0; b<=2; b++)
out[a][b]=in[a][b];
}
void main()
{
clrscr();
printf ("Matrix 1: \n");
create(mA);
printf ("Matrix 2: \n");
create(mB);
printf ("Matrix 3: \n");
create(mC);
clrscr();
print(mA);
print(mB);
print(mC);
printf ("Results: \n");
pr(4,mA);
print(matPR);
copymat (matPR,mat1);
pr(5,mB);
print(matPR);
copymat (matPR,mat2);
razn(mat1,mat2);
print(mRazn);
summ(mRazn,mC);
print(mSUM);
getch();
}