题解 | #整数中1出现的次数)#
整数中1出现的次数(从1到n整数中1出现的次数)
https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6
int NumberOf1Between1AndN_Solution(int n ) { // write code here if(n==0) return 0; int sum=0; for(int i=1;i<=n;i++){ int j,t=i; while(1) { if(j==1) sum++; j=t%10; t=t/10; if(t==0&&j==0) break; } } return sum; }