实验二

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define N 5
#define R1 586
#define R2 701

int main()
{
	int number;
	int i;
	
	srand(time(0));
	
	for(i = 0;i < N; ++i)
	{
		number = rand()%(R2 - R1 + 1) + R1;
		printf("20228330%04d\n",number);
	
	}
	
	return 0;
}

#include <stdio.h>

int main()
{
	double x, y;
	char c1, c2, c3;
	int a1, a2, a3;
	
	scanf("%d%d%d", &a1, &a2, &a3);
	printf("a1 = %d,a2 = %d,a3 = %d\n", a1, a2, a3);
	
	getchar();
	scanf("%c%c%c", &c1, &c2, &c3);
	getchar();
	printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
	
	scanf("%lf,%lf",&x,&y);
	printf("x = %lf, y = %lf\n", x, y);
	
	return 0;
}

#include <stdio.h>
#include <math.h>

int main() {
	
	double x, ans;
	
	while(scanf("%lf", &x) != EOF) {
		ans = pow(x, 356);
		printf("%.2f的365次方：%.2f\n", x, ans);
		printf("\n");
	}
	
	return 0;
} 

#include <stdio.h>
#include <math.h>

int main() {
	
	double x, ans;
	
	while(scanf("%lf", &x) != EOF) {
		ans = 9.0 / 5 * x + 32;
		printf("摄氏度%.2f时，华氏度%.2f\n", x, ans);
		printf("\n");
	}
	
	return 0;
} 

#include <stdio.h>

int main() {
	
	char c;
	
	while(scanf("%c", &c) != EOF) {
		getchar();
		if(c == 'r') printf("stop!\n");
		else if(c == 'g') printf("go go go\n");
		else if(c == 'y') printf("wait a minute\n");
		else printf("something must be wrong...\n");
	}
	
	
	return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include<time.h>

int main() {
	
	srand(time(0));
	
	int d = rand() % 30 + 1;
	
	printf("猜猜2023年4月哪一天会是你的lucky day\n\n");
	printf("开始喽，你有三次机会，猜吧（1~30）：");
	
	int x;
	scanf("%d", &x);
	printf("\n");
	
	if(x == d) {
		printf("哇，猜中了:~)");
	} 
	else {
		if(x < d) { printf("你的日期猜早了，你的lucky day还没到呢\n\n"); }
		if(x > d) { printf("你的日期猜晚了，你的lucky day已经过了\n\n"); }
		printf("再猜（1~30）：");
		scanf("%d", &x);
		printf("\n");
		
		if(x == d) {
			printf("哇，猜中了:~)");
		} 
		else {
			if(x < d) { printf("你的日期猜早了，你的lucky day还没到呢\n\n"); }
			if(x > d) { printf("你的日期猜晚了，你的lucky day已经过了\n\n"); }
			printf("再猜（1~30）：");
			scanf("%d", &x);
			printf("\n");
		
			if(x == d) {
				printf("哇，猜中了:~)");
			} 
			else {
				if(x < d) { printf("你的日期猜早了，你的lucky day还没到呢\n\n"); }
				if(x > d) { printf("你的日期猜晚了，你的lucky day已经过了\n\n"); }
				printf("次数用完了，偷偷告诉你：4月，你的lucky day是%d号", d);
			}
		}
	}
	
	
	return 0;
}

#include <stdio.h>

int main() {
	
	int i, j;
	
	for(i = 1;i <= 9; i++) {
		for(j = 1;j <= i; j++) {
			printf("%d*%d =%3d ", j, i, j * i);
		} 
		printf("\n");
	}
	
	return 0;
}

#include <stdio.h>

int main() {
	
	int n;
	
	printf("input n:");
	scanf("%d", &n);
	
	for(int i = 1;i <= n; i++) {
		for(int k = 1;k <= 3; k++) {
			for(int j = 1;j <= i - 1; j++) {
				printf("      ");
			}
			for(int j = 1;j <= 2 * (n - i) + 1; j++) {
				if(k == 1) printf(" O    ");
				if(k == 2) printf("<H>   ");
				if(k == 3) printf("I I   ");
			}
			printf("\n");
		}
	}
	
	
	return 0;
}