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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a,b=1;
  5. 	scanf("%d",&a);
  6. 	if(a>=0){
  7. 		switch(a){
  8. 		case 0:
  9. 		case 1:
  10. 		case 2:
  11. 		case 3:
  12. 		case 4:
  13. 		case 5:
  14. 		case 6:
  15. 		case 7:
  16. 		case 8:
  17. 		case 9:
  18. 			printf("入力された整数は1桁");
  19. 			break;
  20. 		default:
  21. 			do{
  22. 				a=a/10;
  23. 				b=b+1;
  24. 			}while(a>=10);
  25. 			printf("入力された整数は%d桁",b);
  26. 		}
  27. 	}	
  28. 	else{
  29. 		switch(a){
  30. 			case -1:
  31. 			case -2:
  32. 			case -3:
  33. 			case -4:
  34. 			case -5:
  35. 			case -6:
  36. 			case -7:
  37. 			case -8:
  38. 			case -9:
  39. 				printf("入力された整数は1桁");
  40. 				break;
  41. 			default:
  42. 				do{
  43. 					a=a/10;
  44. 					b=b+1;
  45. 				}while(a<=-10);
  46. 				printf("入力された整数は%d桁",b);
  47. 		}
  48. 	}	
  49. 	return 0;
  50. }
  51.  
Success #stdin #stdout 0s 5224KB
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入力された整数は1桁
https://ideone.com/J6k7F5
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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