c - 从二维数组中找到最大值，并将最大值之前的所有值相加，然后将最大值之后的所有值相乘

Question

这是我的代码

#include<stdio.h>
void main() {
  int a[4][4] = { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 15, 6, 5 },
      { 4, 3, 2, 1 } };

  int max = a[0][0];
  int mIndexF, mIndexE, addition = 0, multiplication = 1, i, j, status = 0, k,
      l;

  // this is for find out maximum value
  for (i = 0; i < 4; i++) {
    for (j = 0; j < 4; j++) {
      if (max < a[i][j]) {
        max = a[i][j];
        mIndexF = i;
        mIndexE = j;
      }
    }
  }

  for (k = 0; k < 4; k++) {
    for (l = 0; l < 4; l++) {
      if ((a[k][l] < max) && (status == 0)) {
        addition += a[k][l];
      } else {
        status++;
        if (a[k][l] != max) {
          multiplication *= a[k][l];
        }
      }
    }
  }

  printf("Addition is %d\n", addition);
  printf("Multiplication is %d", multiplication);
  return 0;
}

我想找到最大值。还想打印最大值之前的值的加法，并希望打印最大值之后的值的乘法值。

Answer 1

以下应该可以解决问题:

#define MAX_INT (((unsigned int)(-1))>>1)
#define MIN_INT (~(MAX_INT))

void minmax(int a[4][4])
{
    int i, j, maxi=0, maxj=0, max=MIN_INT, sum=0, mul=1;
    // this is for find out maximum value
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 4; j++) {
            if (max < a[i][j]) {
                max = a[i][j];
                maxi = i;
                maxj = j;
            }
        }
    }
    // this is to add and multiply
    for (i = 0; i < 4; i++) {
        for (j = 0; j < 4; j++) {
            if (i< maxi || (i==maxi && j<maxj)) // this is "before" 
                 sum += a[i][j];
            else if (i==maxi && j==maxj)        // this is "same" 
                 ;                              //..nothing to do
            else mul *= a[i][j];
        }
    }
    printf("i,j=%d,%d; sum= %d, mul= %d\n", maxi, maxj, sum, mul);
}

编辑:添加了 MAX_INT 和 MIN_INT 的定义