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 } 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.c
// 利用局部static变量的特性,计算阶乘 #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)); return 0; } // 函数定义 long long fac(int n) { static long long p = 1; p = p * n; system("pause"); return p; }
// 利用局部static变量的特性,计算阶乘 #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)); return 0; } // 函数定义 long long fac(int n) { static long long p = 1; printf("p = %lld\n", p); p = p * n; system("pause"); return p; }
静态局部变量在执行过程中只会被分配一次内存空间,并且在整个运行期间其值保持不变
task2_2
#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; } // 函数定义 // 待补足。。。 long func(long s){ int a,b = 1; long t = 0; for(;s != 0; ){ a = s %10; if(a%2 != 0){ t += a*b; b *=10; } s = s/10; } return t; }
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; } // 函数定义 // 待补足。。。 long long func(int n){ if(n==0) return 0; else return func(n - 1)*2 + 1; }
task4
#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; } // 函数定义 // 待补足。。。 int func(int n,int m){ int s1=1,s2=1,s3=1; int ans; int i,j,k; for(i=1;i<=n;++i) s1=s1*i; for(j=1;j<=m;++j) s2=s2*j; for(k=1;k<=(n-m);++k) s3=s3*k; ans=(double)s1/(s2*s3); return ans; }
#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; } // 函数定义 // 待补足。。。 int func(int n,int m){ if(m>n) return 0; else if(m==1||m==n) return 1; else return func(n-1,m)+func(n-1,m-1); }
task5
#include<stdio.h> #include<stdlib.h> void hanoi(unsigned int n,char from,char temp,char to,int *s); void moveplate(unsigned int n,char from,char to,int *s); int main(){ unsigned int n; while(scanf("%u",&n)!=EOF){ int s=0; hanoi(n,'A','B','C',&s); printf("\n一共移动了%d次\n",s); } system("pause"); return 0; } void hanoi(unsigned int n,char from,char temp,char to,int *s){ if(n==1){ moveplate(n,from,to,s); } else { hanoi(n-1,from,to,temp,s); moveplate(n,from,to,s); hanoi(n-1,temp,from,to,s); } } void moveplate(unsigned int n,char from,char to,int *s) { printf("%u:%c-->%c\n",n,from,to); (*s)++; }
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; } // 函数定义 // 待补足。。。 long func(long s){ long ans = 0; long a,t = 1; while(s != 0){ a = s%10; if(a%2 != 0){ ans += t*a; t*= 10; } s /=10; } return ans; }
标签:return,int,long,实验,func,printf,include From: https://www.cnblogs.com/wangmiao-wm/p/18150672