实验任务1
源代码:
#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 }
实现功能:间隔一秒就打印字符“hi, April~”直到打印好十个,打印规则是:这行与上行间隔不超过25且在一行中位置容量只有80,随机取隔行和隔列;打印好后自动跳出。
实验任务2
源代码:
#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 = %lld\n", p); p = p * n; return p; }
运行结果:
.2 预测:8 17
static变量 赋值时只附初值一次,后续只执行运算,且只能被本程序文件调用(一定是这样的!不用实践了 :))
实验任务3
#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){ long long s; if(n==1) s=1; else s=2*func(n-1)+1; return s; }
实验任务4
#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; } int func(int n, int m){ if(n < m || n == 0){ return 0; } else if(m == 0 || n == m){ return 1; } return func(n - 1, m) + func(n - 1, m - 1); }
运行结果:
实验任务5
源代码:
#include<stdio.h> #include<stdlib.h> #include<math.h> double mypow(int x, int y); int main(){ int x, y; double ans; while(scanf("%d%d", &x, &y) != EOF){ ans = mypow(x, y); printf("%d的%d次方:%g\n\n", x, y, ans); } system("pause"); return 0; } double mypow(int x, int y){ if(y == 0){ return 1; } else if(y > 0){ return mypow(x, y - 1) * x; } else if(y < 0){ return (double)mypow(x, y + 1) / (double)x; } }
运行结果:
#include<stdio.h> #include<stdlib.h> #include<math.h> double mypow(int x, int y); int main(){ int x, y; double ans; while(scanf("%d%d", &x, &y) != EOF){ ans = mypow(x, y); printf("%d的%d次方:%g\n\n", x, y, ans); } system("pause"); return 0; } double mypow(int x, int y){ int i,j; double ans=1; if(y>=0) for(i=1;i<=y;i++) ans=ans*x; else{ for(j=1;j<=(-y);j++) ans=ans*x; ans=1.0/ans; } return ans; }
运行结果:
实验任务6
源代码:
#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 a=0; while(scanf("%u",&n)!=EOF){ hanoi(n,'A','B','C'); printf("\n"); a=pow(2,n)-1; printf("一共移动了%d次\n\n",a); } 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("%u:%c-->%c\n",n,from,to); }
运行结果:
实验任务7
源代码:
#include<stdio.h> #include<math.h> #include<stdlib.h> int is_prime(int n); int main(){ int j,k; while(scanf("%d",&j)!=EOF){ for(k=1;k<=j;k++) if(is_prime(k)&&is_prime(j-k))break; printf("%d=%d+%d\n",j,k,j-k); } return 0; } int is_prime(int n){ int i; double m; m=sqrt(n); for(i=2;i<=m;i++) if(n%i==0)break; if(n!=1&&i>m) return 1; else return 0; }
运行结果:
实验任务8
源代码:
#include<stdio.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); printf("nem number is: %ld\n\n",t); printf("Enter a number:"); } return 0; } long func(long s){ long b=0,t=0; int a,m; while(s!=0){ a=s%10; if(a%2!=0) b=10*b+a; s=s/10; } while(b!=0){ m=b%10; t=10*t+m; b=b/10; } return t; }
运行结果:
标签:return,int,long,char,实验,func,include From: https://www.cnblogs.com/zx777/p/17273708.html