C语言：验证下列矩阵是否为魔方阵。魔方阵是每一行、每一列、主副对角线上的元素之和都是相等的矩阵。

#include 
#include 
#include 

int main(void)
{
    int a[5][5] = {17,24,1,8,15,
                   23,5,7,14,16,
                   4,6,13,20,22,
                   10,12,19,21,3,
                   11,18,25,2,9};
    int i, j, iPrv, iCur, iFlag;

    iPrv = 0;
    iCur = 0;
    iFlag = 0;

    for (i = 0; i < 5;i++)              //对角线之和
    {
        iPrv += a[i][i];
        iCur += a[i][4 - i];
    }
    if(iCur != iPrv)
    {
        iFlag = 1;
    }

    for (i = 0; i < 5;i++)               //行之和 
    {
        if(iFlag == 1)
        {
            break;
        }
        iCur = 0;
        for (j = 0; j < 5;j++)
        {
            iCur += a[i][j];
        }
        if(iCur != iPrv)
        {
            iFlag = 1;
        }
    }

    for (j = 0; j < 5;j++)               //列之和
    {
        if(iFlag == 1)
        {
            break;
        }
        iCur = 0;
        for (i = 0; i < 5;i++)
        {
            iCur += a[i][j];
        }
        if(iCur != iPrv)
        {
            iFlag = 1;
        }
    }
    if(iFlag == 0)
    {
        printf("This is magic\n");
    }
    else
    {
        printf("Not magic\n");
    }
    return 0;
}