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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a,b=0;
  5. 	scanf("%d",&a);
  6. 	do{
  7. 		a=a/10;
  8. 		b=b+1;
  9. 	}while(!(a==0));
  10. 	printf("入力された整数は%d桁です",b);
  11.  
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5316KB
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入力された整数は3桁です
https://ideone.com/2yGpGT
language:
C (gcc 8.3)
created:
2 hours ago
visibility:
public

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