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  1. // 九九の表
  2. #include <stdio.h>
  3. #define LINE "---+----------------------------"
  4. int main()
  5. {
  6. int i, j;
  7.  
  8. printf("九九の表\n");
  9. printf(" | ");
  10. for (i = 1; i <= 9; i++) {
  11. printf("%2d ", i);
  12. }
  13. printf("\n");
  14. printf("%s\n", LINE);
  15. for (i = 1; i <= 9; i++) {
  16. printf("%2d | ", i);
  17. for (j = 1; j <= 9; j++) {
  18. printf("%2d ", i * j);
  19. }
  20. printf("\n");
  21. }
  22. printf("%s\n", LINE);
  23. return 0;
  24. }
  25.  
Success #stdin #stdout 0.02s 1720KB
stdin
Standard input is empty
stdout
九九の表
   |  1  2  3  4  5  6  7  8  9 
---+----------------------------
 1 |  1  2  3  4  5  6  7  8  9 
 2 |  2  4  6  8 10 12 14 16 18 
 3 |  3  6  9 12 15 18 21 24 27 
 4 |  4  8 12 16 20 24 28 32 36 
 5 |  5 10 15 20 25 30 35 40 45 
 6 |  6 12 18 24 30 36 42 48 54 
 7 |  7 14 21 28 35 42 49 56 63 
 8 |  8 16 24 32 40 48 56 64 72 
 9 |  9 18 27 36 45 54 63 72 81 
---+----------------------------