#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 }
task2_1
#include <stdio.h> #include<stdlib.h> long long fac(int n); int main() { int i, n; printf("Enter n: "); scanf("%d", &n); for (i = 1; i <= n; ++i) system("pause"); return 0; } long long fac(int n) { static long long p = 1;//初始化p=1只进行一次,后续不会再进行初始化(保留上一次的结果) printf("p=%11d\n",p); p = p * n; return p; }
#include <stdio.h> #include<stdlib.h> long long fac(int n); 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; } long long fac(int n) { static long long p = 1;//初始化p=1只进行一次,后续不会再进行初始化(保留上一次的结果) printf("p=%11d\n",p); p = p * n; return p; }
task2_2
// 练习:局部static变量特性 #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; } // 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; }
初始化只进行一次,后续不会再进行初始化(保留上一次的结果)
task3
#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(int n){ double s; if(n==0) s=0; else s=2*func(n-1)+1; return s;}
task4
第一种方法:
#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(int n, int m){ int i; double up=n,down=m,s; if(m==0) s=1; else {for(i=1;i<=m-1;i++) { up=up*(up-i); down=down*(down-i); } s=up/down;} return s; }
第二种方法:
#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(int n, int m){ if(m==n||m==0) return 1; if(n<m) return 0; else {int s;s=func(n-1,m)+func(n-1,m-1); return s;} }
task5
#include<stdio.h> #include<stdlib.h> #include<math.h> void hanoi(unsigned int n,char from,char temp,char to); void moveplate(unsigned int n,char from,char to); int main() { unsigned int n; int s; while(scanf("%d",&n)!=EOF) { hanoi(n,'A','B','C'); s=pow(2,n)-1; printf("一共移动了%d次\n",s); } 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("%d:%c-->%c\n",n,from,to); }
task6
#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){ int m,t=1; long ans=0; while(s!=0) { m=s%10; if(m%2!=0) { ans=ans+t*m; t=t*10; } s=s/10; } return ans; }
标签:int,long,char,实验,func,printf,include From: https://www.cnblogs.com/bingmingweiai/p/18156394