PTA_C入门和进阶练习

PTA_C 入门和进阶练习

• 编程题练习
• 然后是几点
• I Love GPLT
• 厘米换算英尺英寸
• BCD 解密
• 计算符号函数的值
• 出租车计价
• 计算天数
• 猜数字游戏

编程题练习

然后是几点

#include <stdio.h>

int main()
{
  int time,m,min,hour;
  scanf("%d %d",&time,&m);
  
  min = time % 100;
  hour = time / 100;
  
  if(m >= 0)
  {
    hour += (min + m) / 60;
    min = (min + m) % 60;
  
    printf("%02d%02d\n",hour,min);
  }
  else
  {
    hour += ((min + m) / 60) - 1;
    min = 60 + ((min + m) % 60);
    
    printf("%d%02d\n",hour,min);
  }
  return 0;
}

关键点: 时间流速的正反数计算

I Love GPLT

#include <stdio.h>
#include <string.h>

int main()
{
  char m[] = "I Love GPLT";
  int n = strlen(m);
  
  for(int i = 0; i < n; i++)
  {
    printf("%c\n",m[i]);
  }
  
  return 0;
}

厘米换算英尺英寸

#include<stdio.h>

int main(){
    int cm;
    int foot, inch;
    scanf("%d",&cm);
    
    foot= cm / 30.48;
    inch= 12 * (cm / 30.48 - foot);
    printf("%d %d\n", foot, inch);
    
    return 0;
}

关键点: 理清单位之间的换算

BCD解密

#include <stdio.h>

int main()
{
  int a;
  scanf("%d",&a);
  
  int i = a / 16 * 10 + a % 16;
  printf("%d",i);
  
  return 0;
}

关键点: 十进制转十六进制
参考:https://www.cnblogs.com/gaizai/p/4233780.html#_labelConvert23

计算符号函数的值

#include <stdio.h>

int main()
{
  int a;
  scanf("%d",&a);
  
  if(a > 0)
  {
    printf("sign(%d) = 1\n",a);
  }
  else if(a == 0)
  {
    printf("sign(%d) = 0\n",a);
  }
  else
  {
    printf("sign(%d) = -1\n",a);
  }
  
  return 0;
}

关键点: 符号函数的定义

出租车计价

#include <stdio.h>

int main()
{
  float m;
  int t;
  scanf("%f %d",&m,&t);
  
  float money;
  if(m <= 3)
  {
    money = 10 + t / 5 * 2;
  }
  else if(m <= 10)
  {
    money = 10 + (m - 3) * 2 + t / 5 * 2;
  }
  else
  {
    money = 24 + (m - 10) * 3 + t / 5 * 2;
  }
  
  int a = money;
  float b = money - a;
  if(b*10 >= 5)
  {
    a += 1;
  }
  
  printf("%d",a);
  
  return 0;
}

最后的金钱要四舍五入啊

计算天数

#include <stdio.h>

int main()
{
  int a[]={31,28,31,30,31,30,31,31,30,31,30,31};
  int year,month,day;
  scanf("%d/%d/%d",&year,&month,&day);
  
  int days = 0;
  if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
  {
    a[1] = 29;
  }
  for(int i = 0; i < month - 1; i++)
  {
    days += a[i];
  }
  day += days;
  printf("%d",day);
  return 0;
}

猜数字游戏

#include <stdio.h>

int main()
{
  int number,N,inNum;
  scanf("%d %d",&number,&N);
  
  int i = 0;
  scanf("%d",&inNum);
  while(inNum >= 0)
  {
    i++;
    if(i > N)
    {
      printf("Game Over\n");
      return 0;
    }
    if(inNum > number)
    {
      printf("Too big\n");
    }
    else if(inNum < number)
    {
      printf("Too small\n");
    }
    else
    {
      if(i == 1)
      {
        printf("Bingo!\n");
      }
      else if(i <= 3)
      {
        printf("Lucky You!\n");
      }
      else
      {
        printf("Good Guess!\n");
      }
      return 0;
    }
    scanf("%d",&inNum);
  }
  
  printf("Game Over\n");
  return 0;
}