if循环

#define _CRT_SECURE_NO_WARNINGS 1
#include
int main()
{
  int score = 0;
  scanf("%d/n", &score);
  if (score < 60)
    printf("不及格\n");
  else if (score >= 60 && score < 90)
    printf("及格\n");
  else if(score >= 90 && score <= 100)
    printf("优秀\n");
  return 0;
}