实验2
#include<stdio.h> #include <stdlib.h> #include <time.h> #define N 5 int main() { int grade, number; int i; srand(time(0)); // 以当前系统时间作为随机种子 for(i=0; i<N; ++i) { grade = rand()%4 + 2018;//随机生成学号的前四位,即年级 number = rand()%999 + 1;//随机生成学号的后三位序号 printf("%d8330%04d\n", grade, number); }return 0; }//程序的功能是随机生成学号
#include<stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
int luck, n,c;
luck = rand() % 30 + 1;
printf("请猜幸运日哦");
for (n = 1; n <= 3; n++)
{
scanf_s("%d", &c);
if (luck == c)
{
printf("\n恭喜你猜对了"); break;
}
else
if (n != 3)
printf("\n不好意思,你猜错了哦,再试一次吧");
else
continue;
}
if (n==4)
printf("\n你没有机会了,luckyday是%d日哦", luck);
else
printf("拜拜!");
return 0;
}
#include<stdio.h> #include <stdlib.h> #include <time.h> int main() { char n; while (scanf_s("%c", &n) != EOF) { getchar(); if (n == 'r') printf("stop!"); else if (n == 'g') printf("go go go"); else if (n == 'y') printf("wait a minute"); else printf("something may be wrong."); } return 0; }
#include<stdio.h> #include<math.h> int main() { int i, n, a, k; double s; while (scanf_s("%d%d", &n, &a) != EOF) { k = 0; s = 0; for (i = 1; i <= n; i++) { k = k * 10 + a; s += 1.0 * i / k; } printf("n=%d,a=%d,s=%f\n\n", n, a, s); } return 0; }
#include<stdio.h> #define N 9 int main() { int i, j; for (i = 1; i <= N; i++) { for (j = 1; j <= i; j++) { printf("%d×%d= %2d ", j, i, i * j); } printf("\n"); } return 0; }
#include<stdio.h> int main() { int n,i; scanf("%d",&n); printf("input n:%d\n",n); for(i=1;i<=n;i++) { printf(" o \n"); printf("<H>\n"); printf("I I\n\n"); } return 0; }
#include<stdio.h> int main() { int i, n; scanf_s("%d", &n); printf("input n:%d\n", n); for (i = 1; i <= n; i++) { printf(" o "); } printf("\n"); for (i = 1; i <= n; i++) { printf("<H> "); } printf("\n"); for (i = 1; i <= n; i++) { printf("I I "); } return 0; }