任务一:
源代码:
`#include <stdio.h>
include <stdlib.h>
include <time.h>
define N 5
define N1 397
define N2 476
define N3 21
int main() {
int cnt;
int random_major, random_no;
srand(time(NULL));
cnt = 0;
while(cnt < N) {
random_major = rand() % 2;
if(random_major) {
random_no = rand() % (N2 - N1 + 1) + N1;
printf("20248329%04d\n", random_no);
}
else {
random_no = rand() % N3 + 1;
printf("20248395%04d\n", random_no);
}
cnt++;
}
return 0;
}`
运行结果:
问题1.1:随机选取379到476中的数
问题1.2:随机选取1到21中的数
问题1.3:随机生成五个学号
任务二:
源代码:
`#include <stdio.h>
include <math.h>
int main() {
double a, b, c;
double delta, p1, p2;
while(scanf("%lf%lf%lf", &a, &b, &c) != EOF) {
if(a == 0) {
printf("a = 0, invalid input\n");
continue;
}
delta = bb - 4a*c;
p1 = -b/2/a;
p2 = sqrt(fabs(delta))/2/a;
if(delta == 0)
printf("x1 = x2 = %.2g\n", p1);
else if(delta > 0)
printf("x1 = %.2g, x2 = %.2g\n", p1+p2, p1-p2);
else {
printf("x1 = %.2g + %.2gi, ", p1, p2);
printf("x2 = %.2g - %.2gi\n", p1, p2);
}
}
return 0;
}`
运行结果:
任务三:
源代码:
#include <stdio.h> int main(){ char a; while(scanf("%c",&a)!=EOF){ getchar(); if(a=='r') printf("stop!\n"); else if(a=='g') printf("go go go\n"); else if(a=='y') printf("wait a minute\n"); else printf("something must be wrong...\n"); } return 0; }
运行结果:
任务四:
源代码:
`#include <stdio.h>
int main(){
double a;
printf("输入今日开销,直到输入-1时终止:\n");
double max=0,min=20000,sum=0;
while(scanf("%lf",&a)!=EOF){
if(a==-1)
break;
if(a>max)
max=a;
if(a<min)
min=a;
sum+=a;
}
printf("今日累计消费总额:%0.1f\n",sum);
printf("今日最高一笔开销:%0.1f\n",max);
printf("今日最低一笔开销:%0.1f\n",min);
return 0;
}`
运行结果:
任务五:
源代码:
#include<stdio.h> int main(){ int a,b,c; while((scanf("%d%d%d",&a,&b,&c))!=EOF){ if(a<b+c&&b<a+c&&c<a+b) { if(a==b&&a==c) { printf("等边三角形\n"); } else if(a==b||a==c||b==c) { printf("等腰三角形\n"); } else if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a) { printf("直角三角形\n"); } else { printf("普通三角形\n"); } } else { printf("不能构成三角形\n"); } } return0; }
运行结果:
任务六:
源代码:
`#include <stdio.h>
include <stdlib.h>
include <time.h>
int main() {
int x,n;
srand(time(0));
n=rand()%30+1;
printf("猜猜2024年11月哪一天会是你的lucky day\n");
printf("开始喽,你有三次机会,猜吧(1~30):");
for(int i=0;i<3;i++){
scanf("%d",&x);
if(x==n){
printf("哇,猜中了:)\n");
break;
}
else if(x<n){
printf("你猜的日期早了,你的lucky day还没到呢\n");
}
else if(x>n){
printf("你猜的日期晚了,你的lucky day在前面哦\n");
}
if(i==0||i==1)
printf("再猜(1~30):");
else
printf("次数用光啦。偷偷告诉你,11月你的lucky day是%d号",n);
}
return 0;
}`
运行结果: