C语言做的银行系统

1、c语言做的银行系统#include#include#includestruct cust int zhanghao; /帐号 char mingzi20; /名字 float bal; /开户的金额;struct tran int acc_no; char trantype; float amt;void addcust();void rectran();void prnlowbal();void huizong();void main() int choice; while(choice!=5) system(cls); printf(n*n); printf(n* 银行交易系统 *n);

2、printf(n* -1- 创建新用户信息 *n); printf(n* -2- 银行业务办理 *n); printf(n* -3- 显示低存款用户信息 *n); printf(n* -4- 汇总 *n); printf(n* -5- 退出 *n); printf(n*n); printf(请选择：); scanf( %d,&choice); switch(choice) case 1: addcust(); break; case 2: rectran(); break; case 3: prnlowbal(); break; case 4: huizong(); break; defaul

3、t: exit(0); void addcust() file *fp; char flag=y; struct cust people; if(fp=fopen(sql.txt,w)=null) printf(n * 操作错误，重新输入 *n); getchar(); return; while(flag=y) system(cls); printf(n 帐号：); scanf(%d,&people.zhanghao); printf(n 姓名:); scanf(%s,&people.mingzi); printf(n 金额：); scanf(%f,&people.bal); fwrite(

4、&people,sizeof(struct cust),1,fp); getchar(); printf(n 是否继续（y/n）？：); scanf( %c,&flag); fclose(fp);void rectran() file *fp1,*fp2; char flag=y,found,val_flag; struct cust people; struct tran people2; int size=sizeof(struct cust); if(fp1=fopen(sql.txt,a+f)=null) printf(n * 操作错误，重新输入！ *n); getchar(); ex

5、it(0); if(fp2=fopen(trans.dat,a+f)=null) printf(n * 操作错误，重新输入！ *n); getchar(); return; while(flag=y) system(cls); printf(n帐号：); scanf(%d,&people2.acc_no); found=n; val_flag=n; rewind(fp1); while(fread(&people,size,1,fp1)=1 & found=n) if(people.zhanghao=people2.acc_no) found=y; break; if(found=y) whi

6、le(val_flag=n) printf(n 选择交易方式 存/取（d/w）？:); scanf( %c,&people2.trantype); if(people2.trantype!=d&people2.trantype!=d&people2.trantype!=w&people2.trantype!=w) printf(n * 交易错误,重新输入 *n); else val_flag=y; val_flag=n; while(val_flag=n) printf(n 金额：); scanf(%f,&people2.amt); if(people2.trantype=w|people2.

7、trantype=w) if(people2.amtpeople.bal) printf(n * 余额：%.2f不足.重新输入。 *,people.bal); else people.bal-=people2.amt; val_flag=y; else people.bal+=people2.amt; val_flag=y; fwrite(&people,sizeof(struct tran),1,fp2); fseek(fp1,(long)(-size),1); fwrite(&people,size,1,fp1); else printf(n * 这个帐号不存在！ *n); printf(

8、n 交易是否继续？y/n:); scanf( %c,&flag); fclose(fp1); fclose(fp2); getchar(); getchar(); void prnlowbal() file *fp; struct cust people; char flag=n; getchar(); if(fp=fopen(sql.txt,r)=null) printf(n * 操作错误，重新操作 *); getchar(); return; printf(n 显示帐户余额低于250元的帐号n); while(fread(&people,sizeof(struct cust),1,fp)=

9、1) if(people.bal250) flag=y; printf(n %dt%st%.2f,people.zhanghao,people.mingzi,people.bal); if(flag=n) printf(n *sorry!未找到低于250的帐户 *); getchar(); fclose(fp);void huizong() struct cust people; file *fp; fp=fopen(sql.txt,r); if(fp!=null) system(cls); printf(%-15s%-15s%-15sn,帐号,姓名,余额); while(fread(&people,sizeof(str