C primer plus 練習題 第七章

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1.

 1 #include <stdio.h> 2  3 #define SPACE ‘ ‘ 4 #define NEWLINE ‘\n‘ 5  6 int main() 7 { 8     int spaces,newlines,others; 9     char ch;10     spaces = newlines = others = 0;11     while((ch=getchar())!= ‘#‘)12     {13         /*14         if(ch == SPACE)15         {16             spaces++;17         }else if(ch == NEWLINE)18         {19             newlines++;20         }else21         {22             others++;23         }*/24         switch(ch)25         {26         case SPACE:27             spaces++;28             break;29         case NEWLINE:30             newlines++;31             break;32         default:33             others++;34             break;35         }36     }37     printf("spaces=%d, newlines=%d, others=%d \n", spaces, newlines, others);38     getchar();39     return 0;40 }

 2.

 1 #include <stdio.h> 2  3 int main() 4 { 5     int i; 6     char ch; 7     printf("quit input #"); 8     for(i=1; (ch=getchar())!=‘#‘; i++) 9     {10         printf("%c -- %d \t", ch, ch);11         if(i%8 == 0){12             printf("\n");13         }14     }15     getchar();16     return 0;17 }