C语言中期复习与练习

 #include <stdio.h>

    
 int main()
    
 { int x=0,y=10;
    
    while(x<y)
    
    {   x++;y--;
    
    printf("x");
    
    }
    
     
    
     return 0;
    
 }
    
    
    
    

  
    
 void main()
    
 { int c;
    
    while((c=getchar())!='\n')
    
    {    switch(c-'2')
    
      { case 0:
    
    case 1:putchar(c+2);
    
    case 2:putchar(c+2);break;
    
    case 3:putchar(c+1);
    
    case 4:putchar(c+1);break;
    
       }
    
    }
    
 }