C語言自制找零錢程式
程式的執行大致如上圖一樣。
接下來程式碼：
#include<stdio.h>
#define SIZE 1000//事先定義結構體陣列的大小
int numberOne,numberTwo,i,j,k=0,numberThree;
char num,num1,num2,num3;
struct note
{
double sum;
double money[100];
double customerMoney;
double balance;
int numberK;
} s[SIZE],s1[SIZE];
calcultor()//用來算應該找多少的零錢；
{
FILE *fp;
scanf("%*c",&num3);
for(i=0;; i++)
{
k++;
s[i].sum=0;
printf("請輸入你消費的金錢:\n");
for(j=0;; j++)
{
//因為不知道顧客買幾次所以用字元輸入，以換行為程式截止
scanf("%c",&num);
if(num=='\n') break;
if(num==' ')
{
continue;
}
else
{
s[i].money[j]=num-'0';//將顧客每次輸入的金額存入陣列中
s[i].sum=s[i].sum+s[i].money[j];//最後在計算陣列的總和
}
}
printf("請輸入顧客給的金錢:\n");
//將顧客給的錢及消費的總額存入到結構體中，以及最後找的錢
scanf("%lf",&s[i].customerMoney);
printf("你消費的總金額為:%0.2lf\n",s[i].sum);
s[i].balance=s[i].customerMoney-s[i].sum;
printf("找您:%0.2lf\n",s[i].balance);
scanf("%*c",&num1);
printf("請輸入數字:\n");
printf("1:繼續 2:結束\n");
scanf("%d",&numberOne);
if(numberOne==2)
{
s[i].numberK=k;
break;
}
else
{
scanf("%*c",&num2);
}
}
if((fp=fopen("cost1.txt","a"))==NULL)//將檔案指標關聯到檔案
{
printf("cannot open file\n");
return;
}
for(i=0; i<k; i++) //將2個學生的資訊輸出到檔案
fprintf(fp,"%0.2lf %0.2lf %0.2lf\n",
s[i].customerMoney,s[i].sum,s[i].balance);
fclose(fp);//關閉檔案
}
read()
{
int n;
FILE *fp;
if((fp=fopen("cost1.txt","r"))==NULL)
{
printf("cannot open file\n");
return;
}
for(i=0; i<1000; i++) //此時引用個新的結構體將從檔案中讀取的存入另一個
fscanf(fp,"%lf%lf%lf",
&s1[i].customerMoney,&s1[i].sum,&s1[i].balance);
fclose(fp);//關閉檔案
}
inquiry()///查詢1級選單
{
read();
int a;
printf(" 請選擇數字\n");
printf("++++++++++++++++++++++++++++\n");
printf("+ @1:按照消費金額 +\n");
printf("+ +\n");
printf("+ @2:按找顧客給的錢 +\n");
printf("+ +\n");
printf("+ @3:完整消費記錄 +\n");
printf("+ +\n");
printf("+ @4:返回主選單 +\n");
printf("++++++++++++++++++++++++++++\n");
scanf("%d",&a);
if(a==1)
{
inquirySum();
}
else if(a==2)
{
inquiryCustomerMoney();
}
else if(a==3)
{
Array();
} else if(a==4)
{
main();
}
}
inquirySum()///按照顧客消費的金額
{
int a;
printf(" 請選擇數字\n");
printf("============================\n");
printf(" &1:按照金額的大小 \n");
printf(" \n");
printf(" &2:按照時間的順序 \n");
printf(" \n");
printf(" &3:返回上一層選單 \n");
printf(" \n");
printf(" &4:返回主選單 \n");
printf("============================\n");
scanf("%d",&a);
//printf2();
if(a==1)
{
ArraySum();
printf1();
inquirySum();
}
else if(a==2)
{
ArraySumTime();
printf1();
inquirySum();
}
else if(a==3)
{
printf1();
inquiry();
}
else if(a==4)
{
printf1();
main();
}
}
inquiryCustomerMoney()///按照顧客給的錢
{
int a;
printf(" 請選擇數字\n");
printf("============================\n");
printf(" &1:按照金額的大小 \n");
printf(" \n");
printf(" &2:按照時間的順序 \n");
printf(" \n");
printf(" &3:返回上一層選單 \n");
printf(" \n");
printf(" &4:返回主選單 \n");
printf("============================\n");
scanf("%d",&a);
//printf2();
if(a==1)
{
ArrayCustomerMoney();
printf1();
inquiryCustomerMoney();
}
else if(a==2)
{
ArrayCustomerMoneyTime();
printf1();
inquiryCustomerMoney();
}
else if(a==3)
{
printf1();
inquiry();
}
else if(a==4)
{
printf1();
main();
}
}
int langding()
{
int a,b;
printf(" 歡迎來到本程式\n");
printf("****************************\n");
printf("* 1:進入 *\n");
printf("* *\n");
printf("* *\n");
printf("* 2:查詢 3:退出 *\n");
printf("* *\n");
printf("* *\n");
printf("****************************\n");
printf("請選擇數字:\n");
scanf("%d",&a);
return a;
}
print()
{
printf("--------------------------------\n");
}
printf1()
{
printf("******************************\n");
}
printf2()
{
printf("_______________________________\n");
}
first1()///初次呼叫時的東西
{
int a,b;
int i=0;
FILE *fp;
char str[7],str1[7],str2[7];
printf(" 請設定您的密碼\n");
printf("****************************\n");
printf("* *\n");
printf("* *\n");
printf("* *\n");
printf("* 1:進入 2:退出 *\n");
printf("* *\n");
printf("* *\n");
printf("****************************\n");
printf("請選擇數字:\n");
scanf("%d%*c",&a);
if(a==1)
{
printf("請第一次輸入你的密碼:");
gets(str);
printf("請第二次輸入你的密碼:");
gets(str1);
///進行兩次的密碼比較
if(strcmp(str,str1)==0)
{
///通過這個將密碼存入
if((fp=fopen("code.txt","w"))==NULL)
{
printf("can't open file\n");
exit(0);
}
fputs(str,fp);
fclose(fp);
main();
}
else
{
///密碼錯誤時用for迴圈來繼續輸入
printf("您的密碼錯誤，請重新輸入:");
gets(str1);
for(i=0;; i++)
{
if(strcmp(str,str1)==0)
{
if((fp=fopen("code.txt","w"))==NULL)
{
printf("can't open file\n");
exit(0);
}
fputs(str,fp);
fclose(fp);
break;
}
else
{
printf("您的密碼錯誤，請重新輸入:");
gets(str1);
}
}
main();
}
}
}
LandingQuery()///查詢登入
{
int a,b,c;
int i=0;
FILE *fp;
char str[7],str1[7],str3[5]= {'q','u','i','t'},t;
if((fp=fopen("code.txt","r"))==NULL)
{
printf("can't open file\n");
exit(0);
}
while(!feof(fp)) //讀取檔案
{
fgets(str1,128,fp);
}
printf(" 請輸入您的密碼\n");
printf("----------------------------\n");
scanf("%c",&t);
gets(str);
if(strcmp(str,str1)==0)
{
///呼叫所查詢的函式，
read();
inquiry();
print();
main();
}
else
{
printf(" 您的密碼錯誤\n");
printf("++++++++++++++++++++++++++++\n");
printf("+ +\n");
printf("+ @1:重新輸入 +\n");
printf("+--------------------------+\n");
printf("+ @2:返回主選單 +\n");
printf("+ +\n");
printf("++++++++++++++++++++++++++++\n");
scanf("%d%*c",&a);
if(a==1)
{
printf("請輸入密碼:");
gets(str);
for(i=0;; i++)
{
c=0;
if(strcmp(str,str1)==0)
{
break;
}
else
{
printf("您的密碼錯誤，請重新輸入:\n");
printf("^^^^^^^^^^^^^^^^^^^^^^^^^\n");
printf("溫馨提示:如果你輸入quit，將會回到主選單\n");
gets(str);
printf("___________________________\n");
///引用c來判斷這個迴圈啥時結束
if(strcmp(str,str3)==0)
{
c=1;
break;
}
}
}///當密碼數對後，停止後直接呼叫相應的函式
if(c==1)
{
main();
}
else
{
read();
inquiry();
print();
main();
}
}
else
{
///呼叫主選單的函式
main();
}
}
}
int Index()
{
///對結構體中的記錄進行查詢
int i,j,index;
index=0;
read();
for(i=0;; i++)
{
index++;
if(s1[i].customerMoney==0)
break;
}
return index-1;
}
ArrayCustomerMoney()///顧客給的錢
{
///主要用來實現排序
int i,j,h;
double t;
h=Index();
for(i=0; i<h-1; i++)
{
for(j=0; j<h-i-1; j++)
{
if(s1[j].customerMoney>s1[j+1].customerMoney)
{
t=s1[j].customerMoney;
s1[j].customerMoney=s1[j+1].customerMoney;
s1[j+1].customerMoney=t;
}
}
}
printf("============================\n");
for(i=0; i<h; i++)
{
printf("%d %0.2lf\n",i+1,s1[i].customerMoney);
}
}
ArraySum()///消費總額
{
///主要用來實現排序
int i,j,h;
double t;
h=Index();
for(i=0; i<h-1; i++)
{
for(j=0; j<h-i-1; j++)
{
if(s1[j].sum>s1[j+1].sum)
{
t=s1[j].sum;
s1[j].sum=s1[j+1].sum;
s1[j+1].sum=t;
}
}
}
printf("============================\n");
for(i=0; i<h; i++)
{
printf("%d %0.2lf\n",i+1,s1[i].sum);
}
}
Array()///完整的排序
{
int n;
printf(" 你想要查詢的所有記錄:\n");
printf("序號 顧客給的錢 消費總額 找錢 \n");
for(i=0; i<1000; i++)
{
if(s1[i].customerMoney==0.00&&s1[i].sum==0.00) break;
if(i<=9)
{
printf(" %d: %0.2lf %0.2lf %0.2lf\n",i,
s1[i].customerMoney,s1[i].sum,s1[i].balance);
}
else
{
printf("%d: %0.2lf %0.2lf %0.2lf\n",i,
s1[i].customerMoney,s1[i].sum,s1[i].balance);
}
}
}
ArrayCustomerMoneyTime()///顧客給的錢按時間排序
{
print();
int h;
h=Index();
for(i=0; i<h; i++)
{
printf(" %d: %0.2lf\n",i+1,s1[i].customerMoney);
}
}
ArraySumTime()///消費總額按時間排序
{
print();
int h;
h=Index();
for(i=0; i<h; i++)
{
printf(" %d: %0.2lf\n",i+1,s1[i].sum);
}
}
int main()
{
FILE *fp;///定義指標
///讀取檔案將他與原先的密碼進行比較；
char str1[8],str3[8]= {'0','0','0','0','0','0'};
char ch;
if((fp=fopen("code.txt","r"))==NULL)
{
printf("can't open file\n");
exit(0);
}
while(!feof(fp)) //讀取檔案
{
fgets(str1,128,fp);
}
///進行檔案比較；
if(strcmp(str1,str3)==0)
{
first1();
}
else
{
read();
numberThree=langding();
if(numberThree==1)
{
calcultor();//呼叫計算的函式
print();
main();//呼叫自身的函式
}
else if(numberThree==2)
{
LandingQuery();
}
}
return 0;
}