C语言求矩阵的逆

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>


#define N 10

int getA(int arcs[N][N], int n)//按第一行展开计算|A|
{
    if (n == 1)
    {
        return arcs[0][0];
    }
    int ans = 0;
    int temp[N][N];
    int i, j, k;
    for (i = 0; i<n; i++)
    {
        for (j = 0; j<n - 1; j++)
        {
            for (k = 0; k<n - 1; k++)
            {
                temp[j][k] = arcs[j + 1][(k >= i) ? k + 1 : k];

            }
        }
        int t = getA(temp, n - 1);
        if (i % 2 == 0)
        {
            ans += arcs[0][i] * t;
        }
        else
        {
            ans -= arcs[0][i] * t;
        }
    }
    return ans;
}
void getAStart(int arcs[N][N], int n, int ans[N][N])//计算每一行每一列的每个元素所对应的余子式，组成A*
{
    if (n == 1)
    {
        ans[0][0] = 1;
        return;
    }
    int i, j, k, t;
    int temp[N][N];
    for (i = 0; i<n; i++)
    {
        for (j = 0; j<n; j++)
        {
            for (k = 0; k<n - 1; k++)
            {
                for (t = 0; t<n - 1; t++)
                {
                    temp[k][t] = arcs[k >= i ? k + 1 : k][t >= j ? t + 1 : t];
                }
            }


            ans[i][j] = getA(temp, n - 1);
            if ((i + j) % 2 == 1)
            {
                ans[i][j] = -ans[i][j];
            }
        }
    }
}




int main()
{
    
    int arcs[N][N];
    int astar[N][N];
    int i, j;
    int n;
    while (scanf_s("%d", &n) != EOF && n)
    {
        for (i = 0; i<n; i++)
        {
            for (j = 0; j<n; j++)
            {
                scanf_s("%d", &arcs[i][j]);
            }
        }
        int a = getA(arcs, n);
        if (a == 0)
        {
            printf("can not transform!
");
        }
        else
        {
            getAStart(arcs, n, astar);
            for (i = 0; i<n; i++)
            {
                for (j = 0; j<n; j++)
                {
                    printf("%.3lf ", (double)astar[i][j] / a);
                }
                printf("
");
            }
        }
        printf("
");

    }
    system("pause");
    return 0;
}