第十一次作业

1求字符串长度

#include <stdio.h>

main()

{

 

         char str[80];

         int i=0;

         int length=0;

         gets(str);

         puts(str);

         while(str[i++]!='\0')

                   length++;

         printf("字符串长度为:%d\n",length);

}

 

 

 

2       #include<stdio.h>

main()

{

 

         char str[20];

         int i,cnt;

         cnt=i=0;

         gets (str);

         while(str[i]!='\0')

         {

                   if(str[i]>='A'&&str[i]<='Z')

                            cnt++;

                            i++;

         }

         printf("大写字母的个数为:%d\n",cnt);

}

 

 

 

3 #include<stdio.h>

main()

{

 

         char str[20];

         int i,j;

         j=i=0;

         gets (str);

         while(str[i]!='\0')

         {

                   if(str[i]>='*')

                            str[j++]=str[i];

                            i++;

         }

         i=0;

         while(i<j)

                   putchar(str[i++]);

}

 

 

 

 

4#include<stdio.h>

main()

{

         char a[20],b[20];

         int i,j;

         gets(a);

         for(i=j=0;a[i]!='\0';i++)

         {

                   b[j++]=a[i];

                   if((i+1)%3==0)

                            b[j++]=' ';

         }

         b[j]='\0';

         puts(b);

 

        

}

 

 

 

5#include<stdio.h>

main()

{

         char str[80];

         int i=0;

         gets(str);

                 while (str[i]!='\0')

                   {

                            if((i+1)%2==1&&str[i]%2==0)

                                     putchar(str[i]);

                            i++;

                   }

 

        

}