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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int i,j,a=1,b=1;
  5.  
  6. for(i=0;i<=8;i++){
  7. printf("\n%dの段:",a);
  8. for(j=0;j<=8;j++){
  9. printf("%3d",a*b);
  10. b=b+1;
  11. }
  12. b=1;
  13. a=a+1;
  14. }
  15. return 0;
  16. }
  17.  
Success #stdin #stdout 0s 5304KB
stdin
Standard input is empty
stdout
1の段:  1  2  3  4  5  6  7  8  9
2の段:  2  4  6  8 10 12 14 16 18
3の段:  3  6  9 12 15 18 21 24 27
4の段:  4  8 12 16 20 24 28 32 36
5の段:  5 10 15 20 25 30 35 40 45
6の段:  6 12 18 24 30 36 42 48 54
7の段:  7 14 21 28 35 42 49 56 63
8の段:  8 16 24 32 40 48 56 64 72
9の段:  9 18 27 36 45 54 63 72 81