C 语言 二维数组

#include<stdio.h>
int main(){
   /* 2D array declaration*/
   int disp[2][3];
   /*Counter variables for the loop*/
   int i, j;
   for(i=0; i<2; i++) {
      for(j=0;j<3;j++) {
         printf("Enter value for disp[%d][%d]:", i, j);
         scanf("%d", &disp[i][j]);
      }
   }
   //Displaying array elements
   printf("Two Dimensional array elements:\n");
   for(i=0; i<2; i++) {
      for(j=0;j<3;j++) {
         printf("%d ", disp[i][j]);
         if(j==2){
            printf("\n");
         }
      }
   }
   return 0;
}

Enter value for disp[0][0]:1
Enter value for disp[0][1]:2
Enter value for disp[0][2]:3
Enter value for disp[1][0]:4
Enter value for disp[1][1]:5
Enter value for disp[1][2]:6
Two Dimensional array elements:
1 2 3 
4 5 6 

int disp[2][4] = {
    {10, 11, 12, 13},
    {14, 15, 16, 17}
};

int disp[2][4] = { 10, 11, 12, 13, 14, 15, 16, 17};

/* Valid declaration*/
int abc[2][2] = {1, 2, 3 ,4 }  
/* Valid declaration*/ 
int abc[][2] = {1, 2, 3 ,4 }  
/* Invalid declaration – you must specify second dimension*/
int abc[][] = {1, 2, 3 ,4 }   
/* Invalid because of the same reason  mentioned above*/
int abc[2][] = {1, 2, 3 ,4 }

#include<stdio.h>
int main(){
   /* 2D array declaration*/
   int abc[5][4];
   /*Counter variables for the loop*/
   int i, j;
   for(i=0; i<5; i++) {
      for(j=0;j<4;j++) {
         printf("Enter value for abc[%d][%d]:", i, j);
         scanf("%d", &abc[i][j]);
      }
   }
   return 0;
}

#include <stdio.h>
int main()
{
   int abc[5][4] ={
            {0,1,2,3},
            {4,5,6,7},
            {8,9,10,11},
            {12,13,14,15},
            {16,17,18,19}
            };
    for (int i=0; i<=4; i++)
    {
        /* The correct way of displaying an address would be
         * printf("%p ",abc[i]); but for the demonstration
         * purpose I am displaying the address in int so that
         * you can relate the output with the diagram above that
         * shows how many bytes an int element uses and how they
         * are stored in contiguous memory locations.
         *
         */
        printf("%d ",abc[i]);
    }
    return 0;
}

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