point 小练习题一

怼烎@ 2022-09-21 01:05 179阅读 0赞

/*
    猜数：首先生成一个介于1-100之间的整数，从键盘
    不断输入数值直到该数值与生成的那个数相符为止，
    并打印出猜数的次数（在主函数中定义intsecret用
    于存放待猜数据，设计函数
    void create_secret(int*secretp)用于生成待猜数据）
    */
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    
    void create_secret(int *secretp)
    {
    
    	srand(time(NULL));
    	*secretp = rand()%100 + 1;
    }
    
    
    void guess(int n)
    {
    	int a;
    	int count = 0;
    
    	while(1){
    		scanf("%d", &a);
    		if(a == n){
    			count++;
    			break;
    		}
    		if(a > n){
    			count++;
    			printf("num too high\n");
    		}
    		if(a < n){
    			count++;
    			printf("num too low\n");
    		}
    	}
    
    	printf("Get it by %d\n", count);
    }
    
    int main(void)
    {
    	int n;
    	create_secret(&n);
    	guess(n);
    
    	return 0;
    }
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./1
    84
    num too high
    55
    num too high
    32
    num too high
    22
    num too low
    28
    num too high
    26
    Get it by 6
    */
    
    
    
    
    
    
    
    
    /*
    使用指针完成数组元素的存数及数据的反向输出
    */
    
    #include <stdio.h>
    
    int main(void)
    {
    	int st[10];
    	int i, *p;
    	int j;
    	p = st;
    
    	for(i = 0; i < 10; i++){
    		scanf("%d", (p + i));
    	}
    
    	
    	for(j = i - 1; j >= 0; j--){
    		printf("%d ", *(p + j));
    	}
    
    	printf("\n");
    
    
    
    	return 0;
    }
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./3
    2 3 5 6 8 9 7 55 6 2
    2 6 55 7 9 8 6 5 3 2 
    */

/*
    函数实现：生成26个排列好的英文字母
    */
    
    #include <stdio.h>
    
    int main(void)
    {
    	char st[26];
    	char *p;
    	int i;
    
    	p = st;
    
    	for(i = 0; i < 26; i++){
    		*(p + i) = 'a' + i;
    	
    	}
    
    	printf("%s\n", p);
    
    
    	return 0;
    }
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./4
    abcdefghijklmnopqrstuvwxyz
    */
    
    
    
    
    
    
    
    /*
    函数实现：删除字符数组中的空格
    */
    #include <stdio.h>
    #define N 1024
    
    char *del_space(char *src)
    {
    	int i, j;
    	for(i = j = 0; src[i] != '\0'; i++){
    		if(src[i] != ' '){
    			src[j++] = src[i];
    		//	j++;
    		}
    
    	}
    
    	src[j] = '\0';
    
    	return src;
    
    }
    
    
    
    
    
    int main(void)
    {
    	char str[N];
    
    	fgets(str, N, stdin);
    	del_space(str);
    	puts(str);
    
    	return 0;
    }
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./5.1
    hello world ni hao
    helloworldnihao
    
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ 
    */

/*
    函数实现：删除字符数组中的空格
    扩展：删除数组中的指定字符
    */
    #include <stdio.h>
    #define N 1024
    
    char *del_space(char *src, char c)
    {
    	int i, j;
    	for(i = j = 0; src[i] != '\0'; i++){
    		if(src[i] != c){
    			src[j++] = src[i];
    		//	j++;
    		}
    
    	}
    
    	src[j] = '\0';
    
    	return src;
    
    }
    
    
    
    
    
    int main(void)
    {
    	char str[N];
    	char c;
    
    	printf("Enter a string\n");
    	fgets(str, N, stdin);
    
    	printf("Enter del's character\n");
    	scanf("%c", &c);
    
    	del_space(str, c);
    
    	puts(str);
    
    
    	return 0;
    }
    
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./5.2
    Enter a string
    hello world ni hao
    Enter del's character
    h
    ello world ni ao
    
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ 
    */<pre name="code" class="cpp">
    
    
    
    /*
    函数实现：删除字符数组中的空格（扩展：删除数组中的指定字符）
    */
    
    
    #include <stdio.h>
    #include <string.h>
    #define N 1024
    
    char *del(char *src);
    //char dest[1024];
    
    int main(void)
    {
    //	char str[] = "hello world haha"; 
    	char str[N];
    
    	fgets(str, N, stdin);
    	printf("%s\n", del(str));
    	return 0;
    }
    
    char *del(char *p)
    {
    	int  i, j;
    	static char dest[1024];
    	for(i = j = 0; *(p + i) != '\0'; i++){
    		if( *(p + i) != ' ' ){
    			dest[j] = *(p + i);
    			j++;
    		}
    	}
    
    	dest[j] = '\0';
    
    	return dest;
    }
    
    
    
    /*
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$ ./5
    hello world
    helloworld
    
    akaedu@akaedu-G41MT-D3:~/lin/719_point/mypoint$*/