C语言课程设计,求高手帮我解释一下这个代码啊,打上注释!再给个流程图。给150分啊

2025-02-24 05:29:18
推荐回答(1个)
回答1:

哎,累死了。

#include 

#include 

#include 

char num[10][6] = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };

int parse(char * input)//就3中操作数 要么是+号,要么是=号 要么是要运算的数据【英文标示的】 

{

int i = 0; int match = 0;

for (i = 0; i < 10; i++) 

    {

match = strcmp(input, num[i]);//比较用户输入和 num数组中的值 比如 three 是第3个元素, 输入three 刚好能返回3 

if (match == 0) return i;

}

return -1;

}//+,=返回-1 数据返回对应的十进制数 

struct TStack  //栈的结构体定义 

{

int data;

struct TStack * next;

};

struct TStack * root = 0; //全局变量,栈的根节点 

void stack_push(int data)//元素入栈 

{

struct TStack * x = (struct TStack *)malloc(sizeof(struct TStack)); //实例化一个节点 

x->data = data; //给节点赋值 

x->next = root; //新节点指向根 

root = x; //根从新赋值为根 保证跟都指向最后一个元素  

}

int stack_pop(int * data) //弹出栈顶元素 并用data返回 ,栈非空返回1 否则返回0  

{

struct TStack * x = root; //x=跟节点 

if (!x) return 0;//如果栈为空就返回0 

root = x->next ; //出栈后 栈顶指针下移 

*data = x->data ;//用data返回栈顶元素的值 

free(x);//释放栈顶元素的内存空间 

return 1;//返回操作成功  

}

int SumFromStack(void)//把栈内所有的英文数据换成一个十进制数据。 

{

int x = 0, y = 0, z = 0, sum = 0;

int tens[] = {1, 10, 100, 1000, 10000};

do 

{

x = stack_pop(&y);// y得到栈顶元素,x为返回状态 

if (x == 0) break;//栈中元素为空,就退出 

sum += y * tens[z++]; //sum 用来得到一个操作数 例如 three five  =35 

}while(z < 5); /*最大计算到五位数*/

return sum;

}

void print(int C) //给定一个数值 返回对应的英文形式 如: 256-->two five sxi

{

char str[256]=""; size_t i = 0;

sprintf(str, "%d", C);//c的%d形式存到str中 比如 C=258 那么 str[0]='2',str[1]='5',str[2]='8' 

for (i = 0; i < strlen(str); i++)

          printf("%s ", num[str[i] - '0']);//根据字符与‘0’的距离 打印出数字对应的num中的字符串。 

printf("\n");

}

int main(void)

{

char str[256] = ""; int A = 0, B = 0, x = 0;//A,B用来记录2个要加的数的十进制  x 用来记录输入的是数据还是+,=号 

do 

{

A = 0; B = 0; root = 0;  x = 0;

for(;;) 

{

str[0] = 0;

scanf("%s", str);//获取字符串的输入 

x = parse(str);//根据输入的字符串转换成对应进制数 

if (x < 0 )//parse 返回-1 有可能是+号,有可能是=号 

{

if (str[0] == '+') A = SumFromStack();//遇到+号,那么肯定+左边的数据全入栈,可以用A得到一个翻译成十进制的运算数 

if (str[0] == '=') 

{

B = SumFromStack();// 遇到=号那么肯定第二个家数也全部入栈了,B得到一个翻译成10进制的元算数据 

break;

}

}

else //否则是运算数据那么就入栈 

{

stack_push(x);

}

}

if (A || B) print(A + B);//如果A,B不同时为0,那么用print函数打印A+B对应的 特殊编码字符 如234->tow three four 

}while(A || B);//一旦A,B同时为0 就退出 

system("pause");

return 0;  

}

流程图中写出了详细的函数调用和程序思路。

楼主如果不给出程序的话,我自己动手写还方便点。人家的代码看着蛋疼。好在他的思路还是清晰好理解的。 流程图附下,楼主赶紧去准备课程设计吧。 

【楼主好好珍惜啊,注释也是一句一句写的,流程图一个一个在visio里面话的,看着你是真的想学东西,所以我弄的很详细。不是为了你的分数来的,而是我对程序的 兴趣】

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