#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <windows.h>
#define N 80
void print_text(int line, int col, char text[]); // 函数声明
void print_spaces(int n); // 函数声明
void print_blank_lines(int n); // 函数声明
int main() {
int line, col, i;
char text[N] = "hi, April~";
srand(time(0)); // 以当前系统时间作为随机种子
for(i = 1; i <= 10; ++i) {
line = rand() % 25;
col = rand() % 80;
print_text(line, col, text);
Sleep(1000); // 暂停1000ms
}
return 0;
}
// 打印n个空格
void print_spaces(int n) {
int i;
for(i = 1; i <= n; ++i)
printf(" ");
}
// 打印n行空白行
void print_blank_lines(int n) {
int i;
for(i = 1; i <= n; ++i)
printf("\n");
}
// 在第line行第col列打印一段文本
void print_text(int line, int col, char text[]) {
print_blank_lines(line-1); // 打印(line-1)行空行
print_spaces(col-1); // 打印(col-1)列空格
printf("%s", text); // 在第line行、col列输出text中字符串
}
功能:每间隔一秒在随机行列生成一个hi,April,并重复十次
#include <stdio.h>
long long fac(int n); // 函数声明
int main() {
int i, n;
printf("Enter n: ");
scanf("%d", &n);
for (i = 1; i <= n; ++i)
printf("%d! = %lld\n", i, fac(i));
return 0;
}
// 函数定义
long long fac(int n) {
static long long p = 1;
p = p * n;
return p;
}
#include <stdio.h>
int func(int, int); // 函数声明
int main() {
int k = 4, m = 1, p1, p2;
p1 = func(k, m); // 函数调用
p2 = func(k, m);
p1 = func(k, m);
p2 = func(k, m); // 函数调用
printf("%d, %d\n", p1, p2);
return 0;
}
// 函数定义
int func(int a, int b) {
static int m = 0, i = 2;
i += m + 1;
m = i + a + b;
return m;
}task2.2为生成上一次生成数的值两倍的程序,初始生成数为2+1+1+k=8,
总结:static变量是只能进行初次初始化的变量,每次重复运行不会重置该类变量的值,只会在每次循环中改变该变量的值
#include <stdio.h>
long long func(int n); // 函数声明
int main() {
int n;
long long f;
while (scanf("%d", &n) != EOF) {
f = func(n); // 函数调用
printf("n = %d, f = %lld\n", n, f);
}
return 0;
}
long long func(n)
{
long long m;
if(n == 1)
m = 1;
else if(n == 2)
m = 2+1;
if(n > 2)
m = func(n-1) + func(n-1) + 1;
return m;
} 
#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));
return 0;
}
int func(n, m)
{
int i = 1,j = 1;
if(m > n)
j = 0;
while(i <= m)
{
j = j*(n - i +1)/(i);
i++;
}
return j;
}
#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));
return 0;
}
int func(n, m)
{
int i = 1,j = 1;
if(m > n||m<0)
j = 0;
else if(m == 1||m == n-1)
j = n;
else
j = func(n-1,m) + func(n-1,m-1);
return j;
}
#include<stdio.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()
{
int i;
unsigned int n;
while(scanf("%u",&n) != EOF)
{
count = 0;
hanoi(n,'A','B','C');
printf("总共移动的步数是%d\n",count);
}
return 0;
}
void hanoi(unsigned int n,char from,char temp,char to)
{
if(n==1)
moveplate(n,from,to);
else
{
hanoi(n-1,temp,to,from);
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++;
}
#include <stdio.h>
#include <math.h>
long func(long s); // 函数声明
int main() {
long s, t;
printf("Enter a number: ");
while (scanf("%ld", &s) != EOF) {
t = func(s); // 函数调用
printf("new number is: %ld\n\n", t);
printf("Enter a number: ");
}
return 0;
}
long func(long s)
{
long j;
int count = 0,k,i;
while(s > 0)
{
i = s % 10;
if(i%2 != 0)
{
for(k = 0;k < count;k++)
{
i = 10*i;
}
j =j +i;
count++;
}
s = s / 10;
}
return j;
}