c program

更新中...有时间在改这些程序...

4.13.10

#include<stdio.h>
int main()
{
  int num,i=0;
  scanf("%d",&num);
  for(;i<num;i++)
     printf("\n");
  return 0;
 }

4.13.13

#include<stdio.h>
int main()
{
  int which_word;
  scanf("%d",&which_word);
  if(which_word<=5&&which_word>=1)
        {
            switch (which_word)
            {
             case 1:
                {
                    printf("who\n");
                    break;
                }
             case 2:
                {
                    printf("what\n");break;
                }
                case 3:
                {
                    printf("and so on\n");break;
                }
             default:
                {
                    printf("and so on\n");break;
                }
            }
        }
        else
            printf("I don't know.\n");
 return 0;
 }

 

4.13.16

#include<stdio.h>
int main()
{
 int temper,pre;
 scanf("%d,%d",&pre,&temper);
 if(pre==1)
    {
     if(temper<32)
         printf("snow\n");
     else if(temper>=32)
         printf("raining\n");
    }
 else if(pre==0)
 {
     if(temper<60)
         printf("cold\n");
     else if(temper>=60)
         printf("warm\n");
 }

 return 0;
 }

 

5.9.1

#include<stdio.h>
int main()
{
 char ch;
 while((ch=getchar())!=EOF)
    {
     if(ch>='A'&&ch<='Z')
         putchar(ch+32);
     else
         putchar(ch);
    }
 return 0;
 }

 

5.9.2

#include<stdio.h>
int main()
{
 char ch;
 while((ch=getchar())!=EOF)
    {
     if(ch>='A'&&ch<='Z'||ch>='a'&&ch<='z')
         putchar(ch+100);
     else
         putchar(ch);
    }
 return 0;
 }