Passing Multidimensional arrays to functions as Pointers

Question

I have to pass two arrays ( A and B with dimensions of 5X4) to two functions called FUNCTION_1 and FUNCTION_2. Both of arrays columns and rows should be passed as POINTERS. FUNCTION_1 will take each element of A array and calculate the sum of prime factors of each element located in A( (with the help of another function called sumPrime), then it will store these sums in array B. FUNCTION_2 has to print both of A and B arrays. ( The normal numbers array, and the prime factors sums array). There are some additions in the program which are not important now but I am going to show them too in respect of clearness.

#include <stdio.h>
#include <stdlib.h>
#define ROW 5
#define COL 4
# include <math.h>
int sumPrime(int number){
     int factor = 2;
     int sum=0;

    while(1!=number){
       if(number%factor==0){
          number /= factor;
          sum+=factor;

          factor = 2;
          continue;
        }
        factor++;
    }

    return sum;
}
int FUNCTION_1(int *a[][20],int *b[][20],int row, int col){
    int c,d;
    for(c=0;c<row;c++){
        for(d=0;d<col;d++){
             b[c][d]=sumPrime(a[c][d]);
            return b[c][d];
        }
    }


}
void FUNCTION_2(int *x[][20],int *y[][20],int rows, int cols){
    printf(" \n A matrix is :\n");
    int e,f;
    for(e=0;e<rows;e++){
        for(f=0;f<cols;f++){
            printf("A[%d][%d] is %d\n",e,f,x[e][f]);



        }
    }
    printf("\n B matrix is:\n");
    for(e=0;e<rows;e++){
        for(f=0;f<cols;f++){
            printf("A[%d][%d] is %d\n",e,f,FUNCTION_1(x,rows,cols,y,rows,cols));



        }
    } 
}






int main(){


    int A[ROW][COL]={0};
    int B[ROW][COL]={0};
    int x=1;
    int i;
    int j;

    for(i=0;i<ROW;i++){

        for(j=0;j<COL;j++){
            A[i][j]=x;
            x=x+2;

        }                                   
    }
    printf("%d",A[0][0]);




    return 0;

}

When trying to perform FUNCTION_1 or FUNCTION_2 I get many errors or even when defining the functions. There is no problem with defining A matrix or prime function! HELP!!

Answer 1

您对矩阵的定义是错误的 .. 使用： func(int* a[20] , int cols)在这种情况下，您将有 20 行，或func(int a[][20] , int rows)并定义一些宏对于列，如果它是固定值。