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作用是将数字转化为字符串
#include<iostream> #include<cmath> #include<algorithm> #include<cstring> #include<string> #include<stack> #include<queue> #include<map> #include<cstdlib> #include<set> #include<ctime> #include<vector> #include<cstdio> #include<list> using namespace std; typedef long long ll; int INF=2147483647; int inf=-2147483648; #define read(x) scanf("%d",&x); #define fo(i,n) for(int i=1;i<=(n);i++) #define me(a) memset(a,0,sizeof(a)); #define one(x) cout<<(x)<<endl; #define two(a,b) cout<<(a)<<" "<<(b)<<endl; int main() { int n; string s; for(int i=1;i<=1000;i++) { s+=to_string(i); } cin>>n; one(s[n-1]); return 0; }
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原文地址:http://www.cnblogs.com/wangmenghan/p/5851353.html