task1
#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
}
实现的功能:每隔1s在第line行第col列打印文本“hi,April~”,重复十次。line和col通过随机数生成。
task2.1
#include <stdio.h>
#include<stdlib.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));
system("pause");
return 0;
}
// 函数定义
long long fac(int n) {
static long long p = 1;
p = p * n;
return p;
}
#include <stdio.h>
#include<stdlib.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));
system("pause");
return 0;
}
// 函数定义
long long fac(int n) {
static long long p = 1;
printf("p = %lld\n", p);
p = p * n;
return p;
}
task2.2
#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); // 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;
}
一致。
局部static变量在程序运行的整个周期中只会被分配一次地址内存,其值不变,不受函数调用次数的影响。
task3
#include <stdio.h>
#include<stdlib.h>
long long func(int n);
int main() {
int n;
long long f;
while (scanf("%d", &n) != EOF) {
f = func(n);
printf("n = %d, f = %lld\n", n, f);
}
system("pause");
return 0;
}
long long func(int n){
if (n==0)
return 0;
else
return 2*(func(n-1)+1)-1;
}
task4
迭代
#include <stdio.h>
#include<stdlib.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;
}
// 函数定义
int func(int n,int m)
{
int i,a=1,b=1;
if(m>n)
{
return 0;
}
else if(m==0&&n==0)
{
return 1;
}
else
{
for(i=1;i<=m;i++)
{
a*=n-i+1;
b*=i;
}
return a/b;
}
}
递归
#include <stdio.h>
#include<stdlib.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;
}
// 函数定义
int func(int n, int m)
{
if(m==n||m==0)
return 1;
else if (m<n)
return func(n-1,m)+func(n-1,m-1);
else
return 0;
}
task5
#include <stdio.h>
#include<stdlib.h>
void hanoi(unsigned int n,char from,char temp,char to,int *m);
void moveplate(unsigned int n,char from,char to,int *m);
int main()
{
unsigned int n;
while(scanf("%u",&n)!=EOF)
{
int m=0;
hanoi(n,'A','B','C',&m);
printf("\n一共移动了%d次.\n\n",m);
}
system("pause");
return 0;
}
void hanoi(unsigned int n,char from,char temp,char to,int *m)
{
if(n==1)
{
moveplate(n,from,to,m);
}
else
{
hanoi(n-1,from,to,temp,m);
moveplate(n,from,to,m);
hanoi(n-1,temp,from,to,m);
}
}
void moveplate(unsigned int n,char from,char to,int *m)
{
printf("%u:%c --> %c\n",n,from,to);
(*m)++;
}
task6
#include<stdio.h>
#include<math.h>
long func(long s);
int main() {
long s,t;
printf("enter a number: ");
while(scanf("%ld",&s)!=EOF){
getchar();
t=func(s);
printf("new number is: %ld\n\n",t);
printf("Enter a number:");
}
return 0;
}
long func(long s){
long ans;
long digit,t;
ans=0;
t=1;
while(s!=0){
digit=s%10;
if(digit%2){
ans+=t*digit;
t*=10;
}
s=s/10;
}
return ans;
}
标签:return,函数,int,编程,long,C语言,char,func,include
From: https://www.cnblogs.com/Potyomkin/p/18157355