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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4.  
  5. int main(){
  6.     int i,j,k;
  7.     int a,b; 
  8.     int **mat;
  9.     scanf("%d %d",&a,&b);
  10.  
  11.     mat = (int**)malloc(a * sizeof(int*));
  12.     if (mat == NULL) {
  13.         fprintf(stderr, "Memory allocation failed for row pointers.\n");
  14.         return 1;
  15.     }
  16.  
  17.     for(i = 0; i < a; i++){
  18.         mat[i] = (int*)malloc(b * sizeof(int));
  19.         if (mat[i] == NULL) {
  20.             fprintf(stderr, "Memory allocation failed for row %d.\n", i);
  21.             for (int l = 0; l < i; l++) {
  22.                 free(mat[l]);
  23.             }
  24.             free(mat);
  25.             return 1;
  26.         }
  27.     }
  28.  
  29.  
  30.  
  31.     int counter = 1; 
  32.     for(i = 0; i < a; i++){
  33.         for(j = 0; j < b; j++){
  34.             mat[i][j] = counter;
  35.             counter++;
  36.         }
  37.     }
  38.  
  39.  
  40.     for(i=0;i<a;i++){
  41.         for(j=0;j<b;j++){
  42.             printf("%d ",mat[i][j]);
  43.         }
  44.         printf("\n");
  45.     }
  46.  
  47.  
  48.     for(i = 0; i < a; i++){
  49.         free(mat[i]);
  50.     }
  51.     free(mat);
  52.  
  53.  
  54.     return 0;
  55. }
Success #stdin #stdout 0s 5256KB
comments (?)
stdin 
2 3
stdout 
1 2 3 
4 5 6
https://ideone.com/VLnsYl
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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