c++试题

曾经终败给现在 2023-06-05 05:52 14阅读 0赞

#include<iostream>
    using namespace std;
    
    int main() 
    { 
    	int i, a[4] = { 2,3,4,5},*pa;
    	pa = a;
    	for (i = 0; i < 4;i++) { 
    		*pa *= *pa;//元素的平方复制给各元素
    		printf("a[%d] = %d\n",i,a[i] );
    		pa++;
    	}
    	return 0;
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    //菱形◇
    int main() 
    { 
    	for (int i = 0; i <= 3;i++) { 
    		for (int j = 0; j <= 2 - i;j++) { 
    			cout << " ";
    		}
    		for (int k = 0; k <= 2 * i;k++) { 
    			cout << "*";
    		}
    		cout << endl;
    	}
    	for (int i = 0; i <= 2;i++) { 
    		for (int j = 0; j <= i;j++) { 
    			cout << " ";
    		}
    		for (int k = 0; k <= 4 - 2 * i;k++) { 
    			cout << "*";
    		}
    		cout << endl;
    	}
    	return 0;
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    //数组各元素求和
    int main() 
    { 
    	int sum(int array[],int len);
    	static int a[5] = { 1,2,3,4,5},result;
    	result = sum(a,5);
    	printf("result = %d\n",result);
    }
    
    int sum(int array[],int len) 
    { 
    	int sum = 0;
    	for (int i = 0; i < len;i++) { 
    		sum = sum + array[i];
    	}
    	return sum;
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    
    int i = 0;
    int fun(int n) 
    { 
    	static int a = 2;
    	a++;
    	return a + n;
    }
    
    int main() 
    { 
    	int k = 5;
    	{ 
    		int i = 2;
    		k += fun(i);//k=5+(3+2)=10
    	}
    	k += fun(i);//k=10+(4+0)=14
    	printf("k=%d\n",k);//k=14
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    
    int main() 
    { 
    	int i, j, x = 0;
    	for (i = 0; i < 2;i++) { 
    	
    		x++;
    		for (j = 0; j <= 3;j++) { 
    		
    			if (j%2) { 
    				continue;
    			}
    			x++;
    		}
    		x++;
    	}
    	printf("x=%d\n",x);//输出：x=8
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    int main() 
    { 
    	int x = 1, y = 0, a = 0, b = 0;
    	switch (x) 
    	{ 
    	case 1:
    		switch (y) { 
    		case 0:a++; break;
    		case 1:b++; break;
    		}
    	case 2:a++; b++; break;
    	case 3:a++; b++;
    	}
    	printf("a=%d,b=%d\n",a,b);//out:a=2,b=1
    }
    --------------------------------------------------- 
    #include<iostream>
    using namespace std;
    
    int min, max;
    int main() 
    { 
    	void findMax(int *p,int n);
    	int a[5] = { 1,2,5,4,3};
    	findMax(a,5);
    	cout <<"min = "<< min <<", max = "<< max;
    	return 0;
    } 
    void findMax(int *p,int n) 
    { 
    	int *q;
    	min = max = *p;
    	for (q = p+1;q<p+n;q++) 
    	{ 
    		if (min>*q) { 
    			min = *q;
    		}
    		else if (max<*q) { 
    			max = *q;
    		}
    	}
    }
    --------------------------------------------------- 
    #include <iostream>
    using namespace std;
    #define LEN sizeof(struct Student)
    
    struct Student 
    { 
    	long num;
    	float score;
    	struct Student *next;
    };
    
    int n;
    
    struct Student* creat() 
    { 
    	struct Student *head;
    	struct Student *p1, *p2;
    	n = 0;
    	p1 = p2 = (struct Student*)malloc(LEN);//动态建立Student节点
    	cin >> p1->num >> p1->score;//输入num，score
    	head = NULL;//head指向空
    	while (p1->num!=0) { //p1的num不等于0
    		n = n + 1;
    		if (n == 1) { 
    			head = p1;//head指向p1
    
    		}
    		else
    			p2->next = p1;
    		p2 = p1;
    		p1 = (struct Student*)malloc(LEN);
    		cin >> p1->num >> p1->score;
    	}
    
    	p2->next = NULL;
    	return(head);
    }
    
    void print(struct Student *head) 
    { 
    	struct Student *p;
    	cout << n << endl;
    	p = head;
    	while (p!=NULL) { 
    		cout << p->num << "," << p->score << endl;
    		p = p->next;
    	}
    }
    
    int main() 
    { 
    	struct Student *head;
    	head = creat();
    	print(head);
    }