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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main(){
  5.     int i,j,k;
  6.     int a,b;
  7.     int **mat;
  8.     scanf("%d %d",&a,&b);
  9.    mat=(int**)malloc(sizeof(int*)*a);
  10.     if (mat==NULL) {
  11.         printf("ERROR");
  12.         return 0;
  13.     }
  14.     for (i=0;i<a;i++) {
  15.     mat[i]=(int*)malloc(sizeof(int)*b);
  16.     if (mat[i]==NULL) {
  17.            printf("ERROR");
  18.             return 0;
  19.         }
  20.     }
  21.     k=1;
  22.     for(i=0;i<a;i++){
  23.         for(j=0;j<b;j++){
  24.             mat[i][j]=k;
  25.             k++;
  26.         }
  27.     }
  28.     int blank=0;
  29.     k--;
  30.     for(int i=k;i>0;i/=10){
  31.         blank++;
  32.     }
  33.     for(i=0;i<a;i++){
  34.         for(j=0;j<b;j++){
  35.             printf("%*d ",blank,mat[i][j]);
  36.         }
  37.         printf("\n");
  38.     }
  39.     for (i = 0; i < a; i++) {
  40.         free(mat[i]);
  41.     }
  42.     free(mat);
  43.     return 0;
  44. }
Success #stdin #stdout 0s 5264KB
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https://ideone.com/Mx3Kfi
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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