1
#include <stdio.h>
double min(double x, double y);
int main()
{
double a, b, c;
printf("请输入2个浮点数: ");
scanf_s("%lf%lf", &a, &b);
c = min(a, b);
printf("%g 和 %g 较小的为 %g\n", a, b, c);
system("pause");
return 0;
}
double min(double x, double y)
{
return (x < y ? x : y);
}
2
#include <stdio.h>
//打印指定的字符j行i列
void chline(char ch, int i, int j);
int main()
{
chline('*', 30, 10);
system("pause");
return 0;
}
void chline(char ch, int i, int j)
{
int x, y;
for (y = 0; y < j; y++)
{
for (x = 0; x < i; x++)
putchar(ch);
putchar('\n');
}
}
3
#include <stdio.h>
//打印指定的字符j行i列
void chline(char ch, int i, int j);
int main()
{
char ch;
int a, b;
printf("请输入你要打印的字符: ");
while ((ch = getchar()) != '\n')
{
printf("请输入你要打印的行数和列数: ");
while (scanf_s("%d%d", &a, &b) == 2)
{
chline(ch, a, b);
break;
}
break;
}
printf("完成\n");
system("pause");
return 0;
}
void chline(char ch, int i, int j)
{
int x, y;
for (y = 0; y < i; y++)
{
for (x = 0; x < j; x++)
putchar(ch);
putchar('\n');
}
}
4
#include <stdio.h>
double h_mean(double i, double j);
int main()
{
double i;
i = h_mean(4, 5);
printf("4 和 5 的调和平均数是 %g\n", i);
system("pause");
return 0;
}
double h_mean(double i, double j)
{
double x, y;
x = (1 / i + 1 / j) / 2;
y = 1 / x;
return y;
}
5
#include <stdio.h>
void larger_of(double *i, double *j);
int main()
{
double a = 5.6, b = 10.12;
printf("x = %g, y = %g\n", a, b);
larger_of(&a, &b);
printf("x = %g, y = %g\n", a, b);
system("pause");
return 0;
}
void larger_of(double *i, double *j)
{
if (*i > *j)
*j = *i;
else
*i = *j;
}
6
#include <stdio.h>
void number(double *a, double *b, double *c);
int main()
{
double a, b, c;
printf("请输入3组浮点数: ");
while (scanf_s("%lf%lf%lf", &a, &b, &c) == 3)
{
printf("你输入的是 a = %g, b = %g, c = %g\n", a, b, c);
number(&a, &b, &c);
printf("从小到大排序: a = %g, b = %g, c = %g\n", a, b, c);
printf("请输入3组浮点数[q退出]: ");
}
printf("再见\n");
system("pause");
return 0;
}
void number(double *a, double *b, double *c)
{
double x, y, z;
if (*a > *b&&*a > *c)
{
z = *a;
if (*b > *c)
{
y = *b;
x = *c;
}
else
{
y = *c;
x = *b;
}
}
else if (*b > *a&&*b > *c)
{
z = *b;
if (*a > *c)
{
y = *a;
x = *c;
}
else
{
y = *c;
x = *a;
}
}
else
{
z = *c;
if (*a > *b)
{
y = *a;
x = *b;
}
else
{
y = *b;
x = *a;
}
}
*a = x;
*b = y;
*c = z;
}
7
#include <stdio.h>
#include <ctype.h>
int ch_a(char ch);
int main()
{
char ch;
int num;
printf("请输入内容: ");
while ((ch = getchar()) != EOF)
{
num = ch_a(ch);
if (num == -1)
{
putchar(ch);
printf(" 不是字母 %d\n", num);
}
else
{
putchar(ch);
printf(" 是字母, 该字母在字母表中的数组位置是 %d\n", num);
}
}
printf("再见\n");
system("paues");
return 0;
}
int ch_a(char ch)
{
int i;
if (isalpha(ch))
{
if (isupper(ch))
{
i = (int)(ch - 'A') + 1;
}
else
i = (int)(ch - 'a') + 1;
}
else
i = -1;
return i;
}
8
#include <stdio.h>
double power(double n, int p);
int main(void)
{
double x, xpow;
int exp;
printf("输入一个数字和该数字将被提升的整数次幕. 输入q退出: ");
while (scanf_s("%lf%d", &x, &exp) == 2)
{
if (x == 0 && exp == 0)
{
printf("0 的 0 次幕未定义.\n");
}
else
{
xpow = power(x, exp);
printf("%g 的 %d 次幕是 %g\n", x, exp, xpow);
}
printf("输入下一对数字或q退出.\n");
}
printf("希望你喜欢这次计算 - 再见!\n");
return 0;
}
double power(double n, int p)
{
double pow = 1;
int i;
if (p > 0)
{
for (i = 1; i <= p; i++)
pow *= n;
}
else
{
for (i = p; i < 0; i++)
pow *= n;
pow = 1 / pow;
}
return pow;
}
9
#include <stdio.h>
//循环函数计算n的p次幕
double power(double n, int p);
//递归函数计算n的p次幕
double power_a(double n, int p);
int main(void)
{
double x, xpow;
int exp;
printf("输入一个数字和该数字将被提升的整数次幕. 输入q退出: ");
while (scanf_s("%lf%d", &x, &exp) == 2)
{
if (x == 0 && exp == 0)
{
printf("0 的 0 次幕未定义.\n");
}
else
{
xpow = power(x, exp);
printf("循环: %g 的 %d 次幕是 %g\n", x, exp, xpow);
xpow = power_a(x, exp);
if (exp >= 0)
printf("递归: %g 的 %d 次幕是 %g\n", x, exp, xpow);
else
printf("递归: %g 的 %d 次幕是 %g\n", x, exp, 1/xpow);
}
printf("输入下一对数字或q退出.\n");
}
printf("希望你喜欢这次计算 - 再见!\n");
return 0;
}
double power(double n, int p)
{
double pow = 1;
int i;
if (p > 0)
{
for (i = 1; i <= p; i++)
pow *= n;
}
else
{
for (i = p; i < 0; i++)
pow *= n;
pow = 1 / pow;
}
return pow;
}
double power_a(double n, int p)
{
double pow = 1;
if (p > 0)
pow = n * power_a(n, p - 1);
else if (p < 0)
pow = n * power_a(n, p + 1);
return pow;
}
10
#include <stdio.h>
void to_base_n(int n, int m);
int main()
{
int x;
int y;
bk:printf("请输入一个整数并输入要打印的格式: ");
while (scanf_s("%lu%d", &x, &y) == 2)
{
if (y < 2 || y > 10)
{
printf("打印的格式请输入2-10进制之间: \n");
goto bk;
}
else
{
printf("%d 的 %d 进制为 ", x, y);
to_base_n(x, y);
putchar('\n');
}
printf("请输入一个整数并输入要打印的格式: ");
}
return 0;
}
void to_base_n(int n, int m)
{
int r;
r = n % m;
if (n >= m)
to_base_n(n / m, m);
putchar('0' + r);
}
11
#include <stdio.h>
unsigned long Fibonacci(unsigned long n);
int main()
{
unsigned long num;
printf("请输入你要查询斐波那契数的第几列: ");
while (scanf_s("%lu", &num) == 1)
{
if (num >= 2)
{
printf("1 1 ");
Fibonacci(num);
}
else
printf("请重新输入2以上的整数: \n");
printf("请输入你要查询斐波那契数的第几列[q退出]: ");
}
return 0;
}
unsigned long Fibonacci(unsigned long num)
{
int x = 2;
unsigned long n, m, i, j;
n = 1;
m = 1;
for (i = 3; i <= num; i++)
{
if (x % 10 == 0)
putchar('\n');
x++;
j = n + m;
n = m;
m = j;
printf("%-7lu ", j);
}
putchar('\n');
}
