实验任务1
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <windows.h>
#define N 80
void print_text(int line, int col, char text[]);
void print_spaces(int n);
void print_blank_lines(int n);
int main() {
int line, col, i;
char text[N] = "hi, November~";
srand(time(0));
for(i = 1; i <= 10; ++i) {
line = rand() % 25;
col = rand() % 80;
print_text(line, col, text);
Sleep(1000);
}
return 0;
}
void print_spaces(int n) {int i;
for(i = 1; i <= n; ++i)
printf(" ");
}
void print_blank_lines(int n) {
int i;
for(i = 1; i <= n; ++i)
printf("\n");
}
void print_text(int line, int col, char text[]) {
print_blank_lines(line-1);
print_spaces(col-1);
printf("%s", text);
}
在随机位置生成“hi，November~”
实验任务2
2-1
#include <stdio.h>
#include<stdlib.h>
long long fac(int n);
int main()
{
int i, n;
printf("Enter n: ");
scanf_s("%d", &n);
for (i = 1; i <= n; ++i)
printf("%d! = %lld\n", i, fac(i));
system("pause");
return 0;
}
long long fac(int n)
{
static long long p = 1;
printf("p = %lld\n", p);
p = p * n;
return p;
}
2-2
#include<stdlib.h>
#include <stdio.h>
int func(int, int);
int main()
{
int k = 4, m = 1, p1, p2;
p1 = func(k, m);
p2 = func(k, m);
printf("%d, %d\n", p1, p2);
system("pause");
return 0;
}
int func(int a, int b)
{
static int m = 0, i = 2;
i += m + 1;
m = i + a + b;
return m;
}
实验任务3
#include<stdlib.h>
#include <stdio.h>
long long func(int n);
int main()
{
int n;
long long f;
while (scanf_s("%d", &n) != EOF) {
f = func(n);
printf("n = %d, f = %lld\n", n, f);
}
system("pause");
return 0;
}
long long func(int n)
{
int i;
long long a = 1;
for (i = 0; i < n; i++)a = a * 2;
return a - 1;
}
实验任务4
#include<stdlib.h>
#include <stdio.h>
int func(int n, int m);
int main()
{
int n, m;
while(scanf("%d%d", &n, &m) != EOF)
printf("n = %d, m = %d, ans = %d\n", n, m, func(n, m));
system("pause");
return 0;
}
int func(int n,int m)
{
if(n==m||m==0)return 1;
else if(n<m)return 0;
else if(n>m){
double i;
for(i=1;m!=0;--m){
i=i*1.0*n/m;
--n;
}
return i;
}
}
实验任务5
#include<stdio.h>
int mul(int n, int m);
int main()
{
int n, m;
while (scanf_s("%d%d", &n, &m) != EOF)
printf("%d * %d = %d\n", n, m, mul(n, m));
return 0;
}
int mul(int n, int m)
{
int i;
int x = 0;
for (i = 0; i < n; i++)
{
x = x + m;
}
return x;
}
实验任务6
#include<stdio.h>
#include<stdlib.h>
void hanoi(unsigned int n,char from,char temp,char to);
void moveplate(unsigned int n,char from,char to);
int count=0;
int main()
{
unsigned int n;
while(scanf_s("%u",&n)!=EOF){
hanoi(n,'A','B','C');
printf("一共移了%d次\n",count);
count=0;
}
system("pause");
return 0;
}
void hanoi(unsigned int n,char from,char temp,char to)
{
if(n==1)
moveplate(n,from,to);
else{
hanoi(n-1,from,to,temp);
moveplate(n,from,to);
hanoi(n-1,temp,from,to);
}
}
void moveplate(unsigned int n,char from,char to)
{
printf("%u:%c-->%c\n",n,from,to);
count++;
}
实验任务7
#include <stdio.h>
int is_prime(int n);
int main()
{ int num, f;
int stop = 0;
int i = 2;
while (i < 20)
{ i += 2;
for (int k = 2; k < i;k++)
{ num = i - k;
f = is_prime(num);
if (f)
{printf("%d = %d + %d\n", i, k, num);
stop = 1;}
if (stop) break; }
stop = 0;}
return 0;
}
int is_prime(int n)
{if (n == 1) return 0;
for (int i = 2;i < n;i++)
{
int stop = 0;
if (n % i == 0)
{return 0;
stop = 1;
}
if (n == 2 || (n % i != 0 && i == n - 1)) return 1;
if (stop) break;}
}
实验任务8
#include <stdio.h>
long fun(long s);
int main() {
long s, t;
printf("Enter a number: ");
while (scanf_s("%ld", &s) != EOF)
{
t = fun(s);
printf("new number is: %ld\n\n", t);
printf("Enter a number: ");
}
return 0;
}
long fun(long s)
{
int x[500];
long y=0;
int c;
for (c=0;s!=0;s=s/10)
{
if (s % 2 != 0)
{
x[c] = s - s / 10 * 10;
c++;
}
}
for (c=c-1; c >= 0; c--)
y = 10 * y + x[c];
return y;
}
