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  1. #include<stdio.h>
  2.  
  3. int f(int n)
  4. {
  5.     int i,j,count=0;
  6. 	char str[100];
  7.  
  8. 	for(i=1;i<=n;i++){
  9. 		sprintf(str,"%d",i);
  10. 		for(j=0;str[j];j++){
  11. 			if(str[j] == '1')
  12. 			count++;
  13. 		}
  14. 	}
  15. 	return count;
  16. }
  17.  
  18. int main(void)
  19. {
  20. 	int num,ans;
  21. 	puts("nの数は？");
  22. 	scanf("&d",&num);
  23.  
  24. 	ans = f(num);
  25. 	printf("ans=%d\n",ans);
  26.  
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 2856KB
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stdin
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Standard input is empty
stdout
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nの数は？
ans=0
https://ideone.com/I479km
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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