模板网站有哪几类_企网官方网站_建站公司排名_企业网站排名优化

1.

/**

*编写一个函数，通过输入球的半径，返回球的体积

*/

#include <stdio.h>double sphere_volume(double r)
{return r*r*r*4.0/3.0*3.1415926;
}int main(int argc,char *argv[])
{double r;printf("输入半径r的值:\n");scanf("%lf",&r);printf("半径为%lf的球体体积为%.3lf\n",r,sphere_volume(r));return 0;
}

2.

/**

*编写一个函数，通过输入一个数学字符，返回该数字

*/

#include <stdio.h>char num(char n)
{if(n > '0' && n < '9'){return n;}else{return '\0';}}int main(int argc,char *argv[])
{char ch;printf("输入一个数学字符:\n");scanf("%c",&ch);char res = num(ch);if(res == '\0'){printf("输入的不是数字字符!\n");}elseprintf("%c\n",ch);return 0;
}

3.

/**

*编写一个函数，输入四个数据分别表示2个点的x,y坐标，返回两点之间的距离

*/

#include <stdio.h>
#include <math.h>double distance(int x1,int y1,int x2,int y2)
{double x_dis = x2 - x1;double y_dis = y2 - y1;return sqrt(pow(x_dis,2)+pow(y_dis,2));
}int main(int argc,char *argv[])
{printf("分别输入两个点的x与y坐标，用,隔开:\n");int x1,x2,y1,y2;scanf("%d,%d,%d,%d",&x1,&y1,&x2,&y2);double dis = distance(x1,y1,x2,y2);printf("两点之间距离为%.3lf\n",dis);return 0;
}

4.

/**

*编写一个函数，通过参数输入一个整型数，返回该数各位上数字的平方和

*/

#include <stdio.h>int square(int n)
{int sum = 0;int digit;while(n){digit = n % 10;n /= 10;digit *= digit;sum += digit;}return sum;
}int main(int argc,char *argv[])
{int n;printf("输入一个整数:\n");scanf("%d",&n);printf("%d各位上数字的平方和为%d\n",n,square(n));return 0;
}

5.

/**

* 编写一个函数，通过参数输入x的值，计算如下的数学函数值

* 当x>5时，f(x) = 4x + 7;否则f(x) = -2x+3。

* 返回结果值

*/

#include <stdio.h>double fx(double x)
{if(x > 5)return 4 * x + 7;elsereturn -2 * x + 3;
}int main(int argc,char *argv[])
{printf("输入x的值:\n");double x;scanf("%lf",&x);printf("f(x)的结果为%.2lf\n",fx(x));return 0;
}

6.

/**

*设计一个函数，用来求出多个数据的平均值

*/

double ave(int n,int arr[])
{int sum = 0;for(int i = 0; i < n; i++){sum += arr[i];}return (double)sum / n;
}int main(int argc,char *argv[])
{int n;printf("要输入数据的个数:\n");scanf("%d",&n);int arr[n];for(int i = 0; i < n; i++){scanf("%d",&arr[i]);}printf("数据的平均值为%.3lf\n",ave(n,arr));return 0;
}

7.

/**

*设计一个函数，用来查找一个字符串中某个字符的位置

*/

#include <stdio.h>int find_ch(char ch,char str[])
{int i = 0;while(str[i] != '\0'){if(ch == str[i])return i;i++;}return -1;
}int main(int argc,char *argv[])
{char str[] = "abcdefghijklmnopqrstuvwxyz";printf("输入一个字符，查找字符在字符串中的位置!\n");char ch = getchar();int res = find_ch(ch,str);if(res != -1)printf("字符%c在字符串中的第%d处\n",ch,res + 1);elseprintf("字符串中没有此字符！\n");return 0;
}

8.

/**

*设计一个函数，把一个整型数字转换成对应的字符串格式

*/

#include <stdio.h>void change(int len,int n,char str[])
{int is_flag = 0;if(n < 0){n = -n;is_flag = 1;}str[len-1] = '\0';len--;while(len){int x = n % 10;n /= 10;str[len-1] = x + 48;len--;}if(is_flag){str[0] = '-';}else{int i = 0;while(str[i] != '\0'){str[i] = str[i + 1];i++;}str[i-1] = '\0';}
}int main(int argc,char *argv[])
{int n,i = 0;printf("输入一个整数:\n");scanf("%d",&n);int m = n;while(m){m /= 10;i++;}char str[i];change(i,n,str);printf("转换为字符串形式为:%s\n",str);return 0;
}

9.

/**

*设计一个函数，统计字符串中大写字母的个数

*/

#include <stdio.h>
#include <string.h>int captial(int len,char str[])
{int num = 0;int i = 0;while(str[i]){if(str[i] > 'A' && str[i] < 'Z')num++;i++;}return num;
}int main(int argc,char *argv[])
{char str[] = "aBcdEFghijkLmnOpqRStuVwXyz";int res = captial(strlen(str),str);printf("设有以下字符串:\n%s\n",str);printf("字符串中有%d个大写字母\n",res);return 0;
}

10.

/**

*设计函数，实现strcmp的功能

*/

#include <stdio.h>
#include <string.h>int my_strcmp(char str1[],char str2[])
{int i = 0;while(str1[i] != '\0' && str2[i] != '\0'){if(str1[i] > str2[i])return 1;else if(str1[i] < str2[i])return -1;i++;}if(str1[i] == '\0' & & str2[i]  == '\0')return 0;if(str1[i] != '\0')return 1;else return -1;
}int main(int argc,char *argv[])
{char str1[] = "I love you";char str2[] = "I love you";printf("字符串12分别为\n%s\n%s\n",str1,str2);printf("%d\n",my_strcmp(str1,str2));return 0;
}

11.

/**

*编写函数，用于判断输入的字符是不是个数字，是返回1,不是返回0

*/

#include <stdio.h>
#include <string.h>int is_num(char ch)
{if(ch >= '0' && ch <= '9')return 1;return 0;
}int main(int argc,char *argv[])
{char ch;printf("输入一个字符:\n");scanf("%c",&ch);int res = is_num(ch);if(res){printf("是数字！\n");}else{printf("不是数字！\n");}return 0;
}

12.

/**

*设计一个程序，实现一个简单的计算器。要求有菜单函数和加减乘除的函数，主函数调用这些函数实现功能

*/

#include <stdio.h>void print_menu()
{printf("\t1.加法\t2.减法\t3.乘法\t4.除法\t0.退出\n");
}double add(double x,double y)
{return x + y;
}double subtract(double x,double y)
{return x - y;
}double mul(double x,double y)
{return x * y;
}double divide(double x,double y)
{return x / y;
}int main(int argc,char *argv[])
{int n = -1;while(n){print_menu();scanf("%d",&n);if(n == 0)break;double x,y;scanf("%lf%lf",&x,&y);switch(n){case 1:printf("%.3lf+%.3lf=%.3lf",x,y,add(x,y));break;case 2:printf("%.3lf-%.3lf=%.3lf",x,y,subtract(x,y));break;case 3:printf("%.3lf×%.3lf=%.3lf",x,y,mul(x,y));break;case 4:{if(y != 0)printf("%.3lf/%.3lf=%lf",x,y,divide(x,y));}break;}printf("\n");}return 0;
}

13.

/**

*设计函数实现冒泡排序

*/

#include <stdio.h>/**
*设计函数实现冒泡排序
*/void sort(int len,int arr[])
{for(int i = 0; i < len - 1; i++){for(int j = 0; j < len - i - 1; j++){if(arr[j] > arr[j+1]) {int temp = arr[j];arr[j] = arr[j+1];arr[j+1] = temp;}}}
}int main(int argc,char *argv[])
{int arr[15] = {12,23,32,15,16,27,32,9,72,63,82,18,26,37,47};sort(sizeof(arr) / sizeof(arr[0]),arr);for(int i = 0; i < sizeof(arr) / sizeof(arr[0]); i++){printf("%d ",arr[i]);}printf("\n");return 0;
}

14.

/**

* 编写一个函数，实现数组的首位互换

*/

#include <stdio.h>void swap(int len,int arr[])
{for(int i = 0;i < len / 2; i++){int temp = arr[i];arr[i] = arr[len - i - 1];arr[len - i - 1] = temp;}
}
void print_arr(int len,int arr[])
{for(int i = 0; i < len; i++){printf("%d ",arr[i]);}printf("\n");
}int main(int argc,char *argv[])
{int arr[] = {12,23,34,54,65,78,68,69,98,32};int len = sizeof(arr) / sizeof(arr[0]);printf("原数组是:\n");print_arr(len,arr);swap(len,arr);printf("首位交换的数组是:\n");print_arr(len,arr);return 0;
}