ssum.c
上传用户:tamljx
上传日期:2021-06-04
资源大小:60k
文件大小:3k
- /* ssum.c:按财务合计项排序浏览*/
- #include "stdio.h"
- void SortBySum()
- {
- int i,j,k;
- money TmpS; /*定义进行操作时的临时结构体变量*/
- money s[SIZE];/*SIZE,在common.h头文件中定义的常量,值为100 */
- int recNumber = 0;
- char DataFile[40] = ""; /*DataFile存储财务收支信息的文件名*/
- FILE *fp;/*====fp指针指向存储数据的文件名====*/
- /*提示用户输入要进行排序浏览的文件名*/
- printf("nplease input the name of file where data is stored,end with enter key.n");
- gets(DataFile);
- /*提示用户输入要进行排序的文件名*/
- while(*DataFile == (' '))
- {
- printf("nplease input the name of file where data is stored,end with enter key.n");
- gets(DataFile);
- }
- /*以读的方式打开文件,如文件不存在,提示错误*/
- fp=fopen(DataFile,"rb");
- if (fp == NULL)
- {
- printf("nOpen file %s fail!End with any keyn",DataFile);
- perror("Open file fail");
- getch();
- exit(1);
- }
- /*将文件中要排序的信息存入结构体数组*/
- while((fread(&TmpS,sizeof(money),1,fp)) != (int)NULL)
- {
- s[recNumber].Number = TmpS.Number;
- strcpy(s[recNumber].Name, TmpS.Name);
- s[recNumber].in = TmpS.in;
- s[recNumber].out = TmpS.out;
- s[recNumber].sum=TmpS.sum;
- recNumber++;
- }
- fclose(fp);
- /*====如果文件中有记录,则将各条记录按合计值排序===*/
- if(recNumber>1)
- {
- /*====用选择排序法进行按合计的排序====*/
- for(i=0;i<recNumber-1;i++)
- {
- k = i;
- for(j=i+1;j<recNumber;j++)
- {
- if(s[k].sum<s[j].sum) k = j;
- }
- TmpS.Number = s[k].Number;
- strcpy(TmpS.Name,s[k].Name);
- TmpS.in = s[k].in;
- TmpS.out = s[k].out;
- TmpS.sum = s[k].sum;
- s[k].Number = s[i].Number;
- strcpy(s[k].Name,s[i].Name);
- s[k].in = s[i].in;
- s[k].out = s[i].out;
- s[k].sum = s[i].sum;
- s[i].Number = TmpS.Number;
- strcpy(s[i].Name,TmpS.Name);
- s[i].in = TmpS.in;
- s[i].out = TmpS.out;
- s[i].sum = TmpS.sum;
- }
- /*====将排序好的结构体记录写入文件====*/
- fp=fopen(DataFile,"wb+");
- if (fp == NULL)
- {
- printf("nSet up file %sfail !end with anykey.n",DataFile);
- perror("Set up fail");
- getch();
- exit(1);
- }
- for(i=0; i<recNumber; i++)
- {
- if(fwrite(&s[i],sizeof(money),1,fp)!=1)
- {
- printf("nWrite file %s fail!end with anykey.n",DataFile);
- perror("Write file fail!");
- getch();
- exit(1);
- }
- }
- fclose(fp);
- }
- /*====显示排序后的文件====*/
- printf("the finacial info in file %s is as flow:.n",DataFile);
- fp=fopen(DataFile,"rb");
- if (fp == NULL)
- {
- printf("nOpen file%sfail!End with any key n",DataFile);
- perror("Open file fail");
- getch();
- exit(1);
- }
- printf("nNumbertNametintoutttsumn");
- while(fread(&TmpS,sizeof(money),1,fp) != (int)NULL)
- {
- printf("n%ldt%st%4.1ft%4.1ft%4.1fn",TmpS.Number,TmpS.Name,TmpS.in,TmpS.out,TmpS.sum);
- }
- fclose(fp);
- }