如何仅考虑int编号的第一个n密码？

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闭合 2年前。

Answer 1

您可以在循环时使用DO。我相信密码仅在7和8上进行编码。如果您仍然继续进行，则可以继续添加代码。据我所知，我试图在此处进行代码，

#include <stdio.h>
int main() {
  long long n;
  int num=3;
  int count=0;
  printf("Enter an integer: ");
  scanf("%lld", &n);
  if(n>9999999)
  {
      num=4;
  }
  printf("Number of cipher: %d", num);
  // iterate at least once, then until n becomes 0
  // remove last digit from n in each iteration
  // increase count by 1 in each iteration
  do {
    n /= 10;
    count++;
  } while (count!=num);
  if(count==3)
  {
      n/=10;
  }
  printf("Number of cipher: %lld", n);
}