C的學習日誌-簡易的微分積分計算

學校資料結構的作業

跟同學討論之後想到的程式碼下：

#include

#include

#include

int tmp=0;

struct node {

int num;

int degree;

struct node *next;

};

struct node *ptr,*first,*newnode;

void input()

{

do

{

if (tmp == 0)

{

first=(struct node *)malloc(sizeof(first));

scanf("%dx^%d",&first->num,&first->degree);

ptr=first;

} else {

newnode=(struct node *)malloc(sizeof(newnode));

scanf("%dx^%d",&newnode->num,&newnode->degree);

ptr->next = newnode; ptr=newnode;

}

tmp++;

}while(ptr->num!=0);ptr=first;

}

void add()

{

float tmpa=0, tmpb=0, temp=0;

int a,b,i;

scanf("%d",&a);

scanf("%d",&b);

while (ptr->num != 0)

{

tmpa+=(ptr->num/(ptr->degree+1)*((int)pow(a,ptr->degree+1)));

tmpb+=(ptr->num/(ptr->degree+1)*((int)pow(b,ptr->degree+1)));

ptr=ptr->next;

}

temp=tmpa-tmpb;

printf("%f\n",temp);

printf("\n\nEDIT BY FU");

printf("\nhttp://fufuk-k.blogspot.com/\n") ;

printf("mailto:fufukwang@gmail.com/n/n");

system("PAUSE");

}

void show()

{

system("cls");

while (ptr->num != 0)

{

ptr->num=ptr->num*ptr->degree;

ptr->degree++;

printf("%dx^%d",ptr->num,ptr->degree);

ptr=ptr->next;

if (ptr->num != 0)

printf("+");

}

printf("\n\nEDIT BY FU");

printf("\nhttp://fufuk-k.blogspot.com/\n") ;

printf("mailto:fufukwang@gmail.com/n/n");

system("PAUSE");

}

char choose_menu(void)

{

char option1;

system("cls");

printf("\n***********************************");

printf("\n\t請選擇輸入的為微分或積分：");

printf("\n\t0.離開程式");

printf("\n\t1.選擇微分計算");

printf("\n\t2.選擇積入計算");

printf("\n***********************************\n");

do

{

option1=getch();

}while((option1!='0')&&(option1!='1')&&(option1!='2'));

return option1;

}int main(int argc, char *argv[]){ char op='1'; while(1)

{

do{

op=choose_menu();

}while(op!='1'&&op!='2'&&op!='0');

switch (op) {

case '1':

printf("\n請開始以降冪排列輸入，輸入0代表結束\n");

printf("EXP:3x^5+8x^4+3x^2\n");

printf("3x^5\n");

printf("8x^4\n");

printf("3x^2\n");

printf("0\n");

input();

show();

break;

case '2':

system("cls");

printf("\na \n");

printf(" 多項式 \n");

printf("b \n");

printf("\n請先輸入多項式部份，再輸入0代表多項輸入結束\n");

printf("再輸入a與b\n");

printf("EXP：");

printf("\n4 \n");

printf(" 3x^5+8x^4+3x^2 \n");

printf("1 \n");

printf("3x^5\n");

printf("8x^4\n");

printf("3x^2\n");

printf("0\n");

printf("4\n");

printf("1\n\n");

input();

add();
break;

case '0':

printf("\n\nEDIT BY FU");

printf("\nhttp://fufuk-k.blogspot.com/\n") ;

printf("mailto:fufukwang@gmail.com/n/n");

system("PAUSE");

return;

}

}
}

請網路上的高手們能把程式的BUG留言或來信跟我說