本题查找二维数组中的最大值及其行列下标

Question

输入：
3 5 -1 4
7 -32 0 9
-102 45 78 4
输出：
max=78 maxr=2 maxc=2

#include <stdio.h>
#define ROW 3
#define COL 4
int FindMaxbyRow(int (*p)[COL],int row,int col,int *maxRow,int *maxCcol);
int main(void)
{
int a[ROW][COL];
int max,maxr,maxc;
int i,j;
for(i=0;i<ROW;i++)
{
for(j=0;j<COL;j++)
scanf("%d",&a[i][j]);
}
2分

printf("max=%d  maxr=%d   maxc=%d\n",max,maxr,maxc);
return 0;

}
int FindMaxbyRow(int (*p)[COL],int row,int col,int *maxRow,int *maxCcol)
{
int i,j;
int max;
2分

*maxRow=0;
*maxCcol=0;
for(i=0;i<row;i++)
{
    for(j=0;j<col;j++)
    {
        if(2分

)
{
2分

            *maxRow=i;
            *maxCcol=j;
        }
    }
}

2分

}

Answer 1

(1)max=FindMaxbyRow(a,ROW,COL,&maxr,&maxc)
(2) max = p[0][0]
(3) p[i][j] > max
(4)max = p[i][j]
(5)return max
完整代码及各个位置填空标注如下：

#include <stdio.h>
#define ROW 3
#define COL 4
int FindMaxbyRow(int(*p)[COL], int row, int col, int* maxRow, int* maxCcol);
int main(void)
{
    int a[ROW][COL];
    int max, maxr, maxc;
    int i, j;
    for (i = 0; i < ROW; i++)
    {
        for (j = 0; j < COL; j++)
            scanf("%d", &a[i][j]);
    }
    max = FindMaxbyRow(a, ROW, COL, &maxr, &maxc); //(1)

    printf("max=%d  maxr=%d   maxc=%d\n", max, maxr, maxc);
    return 0;
}
int FindMaxbyRow(int(*p)[COL], int row, int col, int* maxRow, int* maxCcol)
{
    int i, j;
    int max;
   
    max = p[0][0]; //(2)
    *maxRow = 0;
    *maxCcol = 0;
    for (i = 0; i < row; i++)
    {
        for (j = 0; j < col; j++)
        {
            if (p[i][j]>max) //(3)
            {
                max = p[i][j]; //(4)
                *maxRow = i;
                *maxCcol = j;
            }
        }
    }
    return max; //(5)

}