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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. //必要があれば変数などを追加してもOKです
  5.  
  6. int main(){
  7.     int i,j,k,s,t;
  8.     int a,b;
  9.     int **mat;
  10.     scanf("%d %d",&a,&b);
  11.  
  12. 	mat=(int **)malloc(sizeof(int)*a);
  13.  
  14. 	for(k=0; k<a; k++){
  15. 		mat[k]=(int *)malloc(sizeof(int)*b);
  16. 	}
  17. 	if(a==NULL){
  18. 		printf("ERROR\n");
  19.         return 0;
  20. 	}
  21.  
  22.     for(s=0; s<a; s++){
  23.     	for(t=0; t<b; t++){
  24.     		mat[s][t]=s*b+t+1;
  25.     	}
  26.     }
  27.  
  28.     for(i=0;i<a;i++){
  29.         for(j=0;j<b;j++){
  30.             printf("%2d ",mat[i][j]);
  31.         }
  32.         printf("\n");
  33.     }
  34.  
  35. 	free(mat);
  36.  
  37.     return 0;
  38. }
  39.  
Success #stdin #stdout 0s 5284KB
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stdin
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4 3
stdout
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 1  2  3 
 4  5  6 
 7  8  9 
10 11 12
https://ideone.com/hggQI2
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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