//task1.c
#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
}
system("pause");
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
}
//以当前系统时间作为随机种子,让其分别对25和80取余,记为line和col,调用函数打印line-1行空行,再打印col-1列空格,最后在第line行、col列输出text中的字符串,并循环十次,每次循环过程中暂停一秒
//task2_1.c
#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.c
#include <stdio.h>
#include <stdlib.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);
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;
}
//理论上分析结果为8与17,与实验运行结果相一致,局部static变量的特点是它位于静态存贮区,在函数调用结束后,它的值仍然存在,并可以影响到下一次调用的过程。
//task3.c
#include <stdio.h>
#include <stdlib.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);
}
system("pause");
return 0;
}
long long func(int n){
int i,s=1;
if(n==0)
s=1;
for(i=1;i<=n;i++)
s=s*2;
s=s-1;
if(n==0)
return s;
else
return 2*func(n-1)+1;
}
//task4_1.c
#include <stdio.h>
#include <stdlib.h>
#include <math.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 (m > n) {
return 0;
}
int result = 1;
int denominator = 1;
for (int i = 1; i <= m; i++) {
result *= n;
result /= denominator;
n--;
denominator++;
}
return result;
}
//task4_2.c
#include <stdio.h>
#include <stdlib.h>
#include <math.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 (m == 0 || m == n) {
return 1;
}
return func(n - 1, m - 1) * n / m;
}
//task5.c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
void hanoi(unsigned int n,char from,char temp,char to,int *num);
void moveplate (unsigned int n, char from, char to);
int main() {
unsigned int n;
int num=0;
while(scanf("%u", &n) != EOF){
hanoi(n,'A','B','C',&num);
printf("\n");
printf("一共移动了%d次\n",num);
num=0;
}
system("pause");
return 0;
}
void hanoi (unsigned int n,char from,char temp,char to,int *num){
if(n==1){
moveplate(n, from, to);
(*num)++;
}
else{
hanoi(n - 1, from, to, temp,num);
moveplate(n, from, to);
(*num)++;
hanoi(n- 1, temp, from, to,num);
}
}
void moveplate(unsigned int n,char from,char to){
printf("%u:%C-->%c\n",n,from,to);
}
//task6.c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
long func(long s);
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: ");
}
system("pause");
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 /=10;
}
return ans;
}
标签:return,函数,int,编程,long,C语言,func,printf,include From: https://www.cnblogs.com/wpydcyyzy/p/18150658