C语言基础第五次作业

题目7-2 统计一行文本的单词个数

1.实验代码

 1 #include <stdio.h>
 2 int main()
 3 {
 4     char a;
 5     int cnt=0,countword=0;
 6       while(1){
 7           scanf("%c",&a);
 8         if(a=='\n'){    
 9             break;
10         }else if(a!=' '){
11             if(a>='a'&&a<='z'||a>='A'&&a<='Z'||a>='0'&&a<='9')    {
12                 countword++;   
13                 cnt++;
14             }
15                 while(1){
16                     scanf("%c",&a);
17                     if(a==' '||a=='\n'){
18                         break;
19                     }
20                     cnt++;
21                 }
22             if(cnt>1){
23                 if(a>='a'&&a<='z'||a>='A'&&a<='Z'||a>='0'&&a<='9')    countword++; 
24             }
25             if(a=='\n'){
26                 break; 
27             }
28         } 
29     }
30       printf("%d",countword);
31     return 0;
32 }

7-3 交换最大值和最小值

 1 #include<stdio.h>
 2 #define N 10
 3 int main()
 4 {    
 5   int i, x, n;    
 6   int min, max;    
 7   int p, q, temp;    
 8   int a[N];    
 9   scanf("%d", &n);    
10   for (i = 0; i < n; i++){        
11     scanf("%d", &a[i]);    
12     }
13     min = a[0];    
14     for (i = 0; i < n; i++)    {        
15       if (min >= a[i])        
16       {            
17         min = a[i];            
18         p = i;        
19       }    
20       
21     }
22     temp = a[0];    
23     a[0] = a[p];    
24     a[p] = temp;
25     max = a[0];    
26     for (i = 0; i < n; i++)    {        
27       if (max <= a[i]){            
28         max = a[i];            
29         q = i;        
30         
31       }    
32       
33     }
34     temp = a[n - 1];    
35     a[n - 1] = a[q];    
36     a[q] = temp;    
37     for (i = 0; i < n; i++)    {    
38       printf("%d ", a[i]);
39       }    
40       return 0;
41   
42 }