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编译环境：Visu部分习题代码丢失，需要请联系博主。
编译环境：Visual Studio 2017al Studio 2017
#include<stdio.h>
#include<stdlib.h>
#define JB 10.00
#define JBT 40
#define JBB 1.5
#define S300 0.15
#define SX150 0.2
#define SX 0.25
int main(void)
//1
{
char c;
int num_b=0, num_n=1, num_o=0;
while ((c=getchar())!='#')
{
if (c ==' ')
num_b++;
else if (c =='\n')
num_n++;
else
num_o++;
}
printf("num_b=%d\tnum_n=%d\tnum_o=%d\n",num_b,num_n,num_o);
system("pause");
return 0;
}
/*遇到的问题：https://blog.csdn.net/qq_28796345/article/details/51296011
打回车程序不会立即开始执行*/
//2
{
char c;
int i=0;
while ((c=getchar())!='#')
{
i++;
if (i % 8 == 0)
printf("\n");
if (c == '\n')
printf("-%d ", c, c);
else
printf("%c-%d ", c, c);
}
getchar();
getchar();
system("pause");
return 0;
}
/*一打回车，程序就开始执行怎么办？
getchar有一个int型的返回值，当程序调用getchar时，程序就等着用户按键，用户输入的字符被存放在键盘缓
冲区中，直到用户按回车为止（回车字符也放在缓冲区中）。当用户键入回车之后，getchar才开始
从stdio流中每次读入一个字符。getchar函数的返回值是用户输入的字符的ASCII码，如出错返回 - 1，
且将用户输入的字符回显到屏幕。如用户在按回车之前输入了不止一个字符，其他字符会保留在键盘缓存区中，
等待后续getchar调用读取。也就是说，后续的getchar调用不会等待用户按键，而直接读取缓冲区中的字符，
直到缓冲区中的字符读完为后，才等待用户按键。
简单来说：在需要连续输入回车的情况下，刚输入完一个字符串，后面还需要输入另一个，
需要加一个getchar（），用它来抵消那回车键，要不第二个字符串会有问题。*/
{
char ch = 0;
int i = 0;
printf("Please enter text to be analyzed:(# to terminate):");
while ((ch = getchar()) != '#')
{
if ((i % 8 == 0) && (i != 0))
{
putchar('\n');
}
i++;
printf("%c:%d ", ch, ch);
}
return;
}//第二题的答案
//3
{
int a, sum_o,sum_j,n_o,n_j,o,j;
float ave;
n_o = 0;
n_j = 0;
sum_o = 0;
sum_j = 0;
while (scanf("%d", &a) == 1)
{
if (a == 0)
break;
if (a % 2 == 0)
{
n_o++;
o = a;
sum_o += o;
}
else
{
n_j++;
j = a;
sum_j += j;
}
}
printf("o=%d\tj=%d\tsum_o=%d\t;sum_j=%d\n",n_o,n_j,sum_o,sum_j);
system("pause");
return 0;
}
//4.
{
int i=0;
char c;
while ((c=getchar())!='#')
{
if (c == '.')
{
putchar('!');
i++;
}
else if (c == '!')
{
printf("!!");
i++;
}
else putchar(c);
}
printf("%d", i);
system("pause");
return 0;
}
//5
{
int i=0;
char c;
while ((c=getchar())!='#')
{
switch (c)
{
case '.':i++;
putchar('!');
break;
case '!':i++;
putchar('!');
putchar('!');
break;
default:putchar(c);
break;
}
}
system("pause");
return 0;
}
//6
{
char per='e', c;
int i = 0;
while ((c=getchar())!='#')//注意优先级！
{
if (per == 'e'&&c == 'i')
i++;
else per = c;
}
printf("%d\n", i);
system("pause");
return 0;
}
//7
{
int hour;
double sum, shui, jing;
scanf("%d", &hour);
if (hour < JBT)
sum = hour * JB;
else sum = (hour - JBT)*1.5*JB + 40 * JB;
if (sum <= 300)
shui = sum * S300;
else if (sum <= 450)
shui = 300 * S300 + (sum - 300)*SX150;
else shui = 300 * S300 + 150 * SX150 + (sum - 450)*SX;
jing = sum - shui;
printf("sum=%lf,shui=%lf,jing=%lf", sum, shui, jing);
system("pause");
return 0;
}
//9
{
int a, b, i,c;
scanf("%d", &a);
for (i = 2; i < a; i++)
{
c = 0;
for (b = 2; b*b< i; b++)
{
if (i%b == 0)
c=1;
}
if (c == 0)
printf("%d ", i);
}
system("pause");
return 0;
}
//10
{
int a, b;
double c=0;
printf("Enter the corresponding to the desired pay rate or action:\n");
printf("1).单身\t2).户主\n");
while(scanf("%d %d", &a,&b)==1)
{
switch (a)
{
case 1: if (b <= 100)
c = 0.15;
else c = 100 * 0.15 + (b - 100)*0.28;
break;
case 2:if (b <= 200)
c = b * 0.15;
else c = 200 * 0.15 + (b - 100)*0.28;
break;
}
printf("%lf\n",c);
printf("Enter the corresponding to the desired pay rate or action:\n");
printf("1).单身\t2).户主\n");
}
system("pause");
return 0;
}
{
int a, b;
while (scanf("%d%d",&a,&b)==1)
{
printf("%d\n", a+b);
}
system("pause");
return 0;
}
//11
{
int i, a=0, b=0, c=0, sum_a,sum_b,sum_c,n;
double sum,p_a=0,p_b=0,p_c=0,p,z=0,yun;
sum_a = sum_b = sum_c = 0;
while ((scanf("%d",&i))==1)
{
switch (i)
{
case 1:printf("Please input yangqi num:\n");
scanf("%d", &a);
sum_a += a;
p_a = sum_a * 2.05;
break;
case 2:printf("Please input tiancai num:\n");
scanf("%d", &b);
sum_b += b;
p_b = sum_b * 1.15;
break;
case 3:printf("Please input huluobu num:\n");
scanf("%d", &c);
sum_c += c;
p_c = sum_c * 1.09;
break;
default: printf("try again!\n");
break;
}
}
p = p_a + p_b + p_c;
if (p >= 100)
{
z = 0.05;
p = p * 0.95;
}
sum = sum_a + sum_b + sum_c;
if (sum <= 5)
yun = 6.5;
else if (sum <= 20)
yun = 14;
else yun = 14 + (sum - 20)*0.5;
printf("yangji=%d,tiancai=%d,huluovo=%d\n", sum_a, sum_b, sum_c);
if (z ==0.05)
printf("p=%lf", p);
else
printf("没有优惠，p=%lf\n" ,p);
printf("yun=%lf\n", yun);
printf("zong=p+yun=%lf", p + yun);
system("pause");
return 0;
}
//o
{
int i=1;
printf("Think a number in your mind,I will gues it.\n");
printf("Input a y if I'm right and an n if I am wrong\n");
while (getchar() != 'y')
{
printf("The number is %d, right?\n", i++);
while (getchar() != '\n')
continue;
}
system("pause");
return 0;
}