C语言，动态分配2维数组并赋初值,然后计算每个数组元素是其相邻的(上下左右)值的平均

C语言，动态分配2维数组并赋初值,然后计算每个数组元素是其相邻的(上下左右)值的平均

#include
void main()
{ int m,n,i,j;
unsigned char *a,*b,*pa,*pb,*pu,*pd,*pl,*pr,*ppa,*ppb; //由于看起来是做中值滤波的程序，
unsigned int x; //所以假定数据是unsigned char型的

scanf("%d %d",&n,&m); //要求行数和列数均大于等于3

a=(unsigned char *)malloc(sizeof(unsigned int)*m*n); if ( a==NULL ) goto ERRORA;

b=(unsigned char *)malloc(sizeof(unsigned int)*(m-2)*(n-2));
for ( i=0,pa=a;i for ( i=0,ppa=a,ppb=b;i { pu=pl=pd=ppa; pu++; pl+=m; pr=pl; pr++; pr++; pd+=(m*2); pb=ppb; pb++;
for ( j=0;j
{
x=(*pu); x+=(*pl); x+=(*pr); x+=(*pd); x>>=2; (*pb)=x; //求中值

}

}
for ( i=0,pa=a+m,pb=b;i for ( j=0,ppa=pa+1;j (*pa)=(*pb)
//至此，a中存放处理过后的数据，但边缘一圈数据没有经过处理。

free(b);

ERRORB: free(a);

ERRORA:;
}

#include <stdio.h> #define row 3   #define col 3   #define ifedge(maxrow,maxcol,currow,curcol) (currow==0||curcol==0||currow==maxrow-1||curcol==maxcol-1)     int main() { int data[row][col]; int counter1,counter2;     int sum=0; for(counter1=0;counter1<row;++counter1) for(counter2=0;counter2<col;++counter2) { printf("请输入数组[%d][%d]元素长海拜剿之济瓣汐抱搂的值:",counter1,counter2); scanf("%d",&data[counter1][counter2]); if(ifedge(row,col,counter1,counter2)) sum+=data[counter1][counter2]; }      for(counter1=0;counter1<row;++counter1) { printf("\n"); for(counter2=0;counter2<col;++counter2) { printf("%3d",data[counter1][counter2]); } } printf("\n\n数组靠边元素的和=%d\n\n",sum); return 0; }