task1
#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
// 利用局部static变量的特性,计算阶乘 #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; }
task2.1.2
// 利用局部static变量的特性,计算阶乘 #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; printf("p = %11d\n",p) ; p = p * n; return p; }
task2.2
// 练习:局部static变量特性 #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; }
static函数的作用:只进行一次初始化,后续将不会再进行,并且下一次计算时使用的是上一次计算的结果(计算结果保留)
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) { static long long f=1; if(n==1) f=1; else f=2*func(n-1)+1; return f; } // 函数定义 // 待补足。。。
task4.1
#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,j,k,up,down1,down2; double c; for(i=n,up=1;i>=1;i--) { up=up*i; } for(j=m,down1=1;j>=1;j--) { down1=down1*j; } for(i=n,j=m,k=i-j,down2=1;k>=1;k--) { down2=down2*k; } c=up/(down1*down2); return c; }
task4.2
#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 c; if(n<m) c = 0; else if(m==n||m==0) c = 1; else c=func(n-1,m)+func(n-1,m-1); return c; }
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:函数,int,编程,long,C语言,char,func,printf,include From: https://www.cnblogs.com/ajybky/p/18160845