GDPU C语言 天码行空 大结局

忍辱负重难逃交题不慎

关于GDPU的c语言线上实验系统，没交上就是无了。系统吞答案时，千万不要相信，所谓系统会有记录的鬼话。

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填空题

1. 递归求阶乘

 #include 

double fac(int n) 
{   
    double f;
    if(n == 1)     
        f=1;
    else 
    f= n * fac(n-1); 
    return f;

}

main()
{     
    double s=0;
    int i,n;
    scanf("%d",&n);
    for(i=1;i<=n;i++)

    s=s + fac(i);  

    printf("s=%.2lf",s);

}

2. 统计文章字符个数

#include 

int main()
{
	int i, j, upp, low, dig, spa, oth;
	char text[5][100];//【1】
	upp = low = dig = spa = oth = 0;

	for(i = 0; i<3; i++)
	{
		printf("please input line %d:", i + 1);
		gets(text[i]);//【2】

		for(j = 0; j < strlen(text[i]); j++)//【3】
		{
			if(text[i][j] >= 'A'&& text[i][j] <= 'Z')
				upp++;
			else if(text[i][j] >= 'a' && text[i][j] <= 'z')
				low++;
			else if(text[i][j] >= '0' && text[i][j] <= '9')
				dig++;
			else if(text[i][j] == ' ')
				spa++;
			else
				oth++;
		}
	}

	printf("\nupper: %d\nlower: %d\ndigit: %d\nblank: %d\nother: %d\n", upp, low, dig, spa, oth);

	return 0;

}

3. 查找学生

#include 
#include 

struct  student
{
	char name[20];
	int score;
};

void search(struct student *p, int n, char *c)
{
	int i, index = -1;;
	for(i = 0; i<n; i++, p++)
	if(strcmp((p+i)->name,c) == 0)
	{
		index = i;
		printf("score:%d",(p+i)->score);
		break;
	}
	if(index == -1)
		printf("No found");

}

void main()
{
	char c[20];
	int i;
	struct  student stu[5] = { { "mary", 90 }, { "jone", 60 }, { "henry", 75 }, { "sofia", 55 }, { "sunny", 88 } };
	gets(c);
	search(stu,5,c);

}

编程题

1. 区间偶数和

#include

int even(int x)
{
	if(x % 2 == 0)
		return 0;
	else
		return 1;
}
int main()
{
	int n, m, i;
	scanf("%d %d", &n, &m);
	long long ans = 0;
	for(i = n; i <= m; i++)
	{
		if(!even(i))
			ans += i;
	}
	printf("s=%lld", ans);
	return 0;
}

2. 求区间因果数

#include

//是因果数返回1
int f(int x)
{
	int t = x;
	int he = 0;
	while(t)
	{
		he += t % 10;
	    t /= 10;
	}
	if(x % he == 0)
		return 1;
	return 0;
}


int main()
{
	int n, m, i;
	scanf("%d %d", &n, &m);
	long long sum = 0;
	int cnt = 0;
	for(i = n; i <= m; i++)
	{
		if(f(i))
		{
			cnt++;
			sum += i;
		}
	}
	printf("count=%d,sum=%lld", cnt, sum);
	return 0;
}

3. 数字求特征值

#include

int main()
{
	int n, m, i;
	scanf("%d", &n);
	int a[100];
	int wei = 1;

	while(n)
	{
		int t = n % 10;
		if((wei % 2) == (t % 2))
			a[wei] = 1;
		else
			a[wei] = 0;
		n /= 10;
		wei++;
	}
	wei--;
	int ans = 0;
	for(i = wei; i > 0; i--)
	{
		ans = ans * 2 + a[i];
	}
	printf("%d", ans);

	return 0;
}

4. 序列前n项和

#include

int main()
{
	int n, m, i;
	scanf("%d", &n);
	int ans = 0;
	for(i = 1; i <= n; i++)
		ans = ans + i*i;
	printf("%d", ans);
	return 0;
}

仅供参考