题解 | #截取字符串#
截取字符串
https://www.nowcoder.com/practice/a30bbc1a0aca4c27b86dd88868de4a4a
#include <iostream> using namespace std; int main() { string str= "hello"; int n; while(cin >> str >> n) { string ss= str.substr(0, n); cout << ss <<endl; } } // 64 位输出请用 printf("%lld")