我需要按姓氏的字母顺序对输出进行排序。问题是，姓氏和其他数据（支付率，毛重等）一起出现。我负责使用quicksort算法按姓氏对我的条目进行排序。我还需要使用外部文件来执行此操作。我知道如何链接和所有这些，虽然我需要弄清楚如何开始。有人能指出我正确的方向吗？我是编程新手，可以使用我能得到的所有帮助。非常感谢！
#include <stdio.h>
#include <stdlib.h>
#include "EmployeeRecord.h"
#include "CalcTaxes.o"
#define ADDR(var) &var
#define REPORTCOLUMNHEADINGS1 "Employee Pay Reg Hrs Gross Fed SSI Net\n"
#define REPORTCOLUMNHEADINGS2 "Name Rate OVT Hrs Pay State Defr Pay\n"
#define BARS "======== ===== ======= ======= ====== ====== =======\n\n"
#define REPORTCOLUMN1 "%s, %s\t%8.2f%8.2f%10.2f%8.2f%8.2f%9.2f\n"
#define REPORTCOLUMN2 "%32.2f%18.2f%8.2f\n\n"
void PrintReportHeadings(FILE * ReportFile); //3.1 PrintReportHeadings
void InitializeAccumulators(int * empCount,float * pr, float * reg,float * ovt,float * gp,float * fedt,float * stt,float * def,float * sst,float * np); //3.2 InitializeAccumulators
void InputEmployeeData(char * firstname,char * lastname,float * hours,float * payrate,float * defr); //3.3 InputEmployeeData
float CalculateGross(float hours, float payrate, float reghours, float ovthours); //3.4 CalculateGross
extern void CalculateTaxes(float gross, float defr, float *ft, float *st, float *ssit); //3.5 CalculateTaxes
void AddDetailToAccumulator(int *empCount,float *pr,float *payrate,float *reg,float *reghours,float *ovt,float *ovthours,float *gp,
float *gross,float *fedt,float *ft,float *stt,float *st,float *sst,float *ssit,float *def,
float *defr,float *np,float *net,float *avgpr,float *avgfedt,float *avgreg,float *avgovt,float *avggp,
float *avgsst,float *avgstt,float *avgnp,float *avgdef);//3.6 AddDetailToAccumulator
void PrintSummaryReport(float pr,float reg,float ovt,float gp,float fedt,float stt,float sst,float def,float np,float avgpr,float avgreg,float avgovt,
float avggp,float avgfedt,float avgstt,float avgsst,float avgdef,float avgnp,FILE * ReportFile); //3.7 PrintSummaryReport
extern void SortByLastName();//3.8 SortByLastName
int main()
{
EmployeeRecord r; // Call Employee Record Definitions
float reghours,ovthours;
float ft,st,ssit;
float pr,reg,ovt,gp,fedt,stt,sst,def,np;
float avgpr,avgreg,avgovt,avggp,avgfedt,avgstt,avgsst,avgdef,avgnp;
char answer;
int empCount;
FILE * ReportFile;
PrintReportHeadings(ReportFile); //Call 3.1 PrintReportHeadings
InitializeAccumulators(&empCount,&pr,®,&ovt,&gp,&fedt,&stt,&def,&sst,&np); //3.2 InitializeAccumulators
do
{
InputEmployeeData(r.firstname,r.lastname,&r.payrate,&r.defr,&r.hours);//Call 3.3 InputEmployeeData
if (r.hours > 40)//Check for Overtime Hours
{
reghours = 40;
ovthours = r.hours - 40;
}
else {
reghours = r.hours;
ovthours = 0;
}
r.gross = CalculateGross(r.hours,r.payrate,reghours,ovthours); //3.4 CalculateGross
CalculateTaxes(r.gross,r.defr,&ft,&st,&ssit);//Call 3.5 CalculateTaxes
r.net = r.gross - ft - st - ssit;// Calculate Net Earnings
printf(REPORTCOLUMNHEADINGS1);
printf(REPORTCOLUMNHEADINGS2);
printf(BARS);
printf(REPORTCOLUMN1,r.lastname,r.firstname,r.payrate,reghours,r.gross,ft,ssit,r.net);
printf(REPORTCOLUMN2,ovthours,st,r.defr);
ReportFile = fopen("report.txt", "a");
fprintf(ReportFile,REPORTCOLUMN1,r.lastname,r.firstname,r.payrate,reghours,r.gross,ft,ssit,r.net);
fprintf(ReportFile,REPORTCOLUMN2,ovthours,st,r.defr);
fclose(ReportFile);
AddDetailToAccumulator(&empCount,&pr,&r.payrate,®,®hours,&ovt,&ovthours,&gp,&r.gross,&fedt,&ft,&stt,&st,&sst,&ssit,
&def,&r.defr,&np,&r.net,&avgpr,&avgfedt,&avgreg,&avgovt,&avggp,
&avgsst,&avgstt,&avgnp,&avgdef);//3.6 AddDetailToAccumulator
while (getchar() != '\n');
printf(" Repeat (Y/N)? : ");
scanf("%c",ADDR(answer));
} while (answer == 'Y' || answer == 'y');
printf("\n"); // print one line for spacing
printf("\nTotals %17.2f%8.2f%10.2f%8.2f%8.2f%9.2f\n",pr,reg,gp,fedt,sst,np);
printf("%32.2f%18.2f%8.2f\n",ovt,stt,def);
printf("\nAverages %15.2f%8.2f%10.2f%8.2f%8.2f%9.2f\n",avgpr,avgreg,avggp,avgfedt,avgsst,avgnp);
printf("%32.2f%18.2f%8.2f\n",avgovt,avgstt,avgdef);
PrintSummaryReport(pr,reg,ovt,gp,fedt,stt,sst,def,np,avgpr,avgreg,avgovt,
avggp,avgfedt,avgstt,avgsst,avgdef,avgnp,ReportFile); //Call 3.7 PrintSummaryReport
fflush(stdin);
getchar();
return 0;
}
void PrintReportHeadings(FILE * ReportFile) //3.1
{
ReportFile = fopen("report.txt", "w");
fprintf(ReportFile,REPORTCOLUMNHEADINGS1);
fprintf(ReportFile,REPORTCOLUMNHEADINGS2);
fprintf(ReportFile,BARS);
fclose(ReportFile);
}
void InitializeAccumulators(int * empCount,float * pr, float * reg,float * ovt,float * gp,float * fedt,float * stt,float * def,float * sst,float * np) //3.2 InitializeAccumulators
{
*empCount = 0;// count initializations
*pr = *reg = *ovt = *gp = *fedt = *stt = *def = *sst = *np = 0;
}
void InputEmployeeData(char * firstname,char * lastname, float * payrate, float * defr, float * hours) //3.3
{
printf("Enter employee's name: "); // input section
scanf("%s%s",firstname,lastname);
printf("Enter hourly pay rate: ");
scanf("%f",payrate);
printf("Enter deferred amount: ");
scanf("%f",defr);
printf("Enter hours worked this pay period: ");
scanf("%f",hours);
}
float CalculateGross(float hours, float payrate, float reghours, float ovthours) // 3.4
{
return (reghours * payrate)+(ovthours * payrate * 1.5);
}
void AddDetailToAccumulator(int *empCount,float *pr,float *payrate,float *reg,float *reghours,float *ovt,float *ovthours,float *gp,
float *gross,float *fedt,float *ft,float *stt,float *st,float *sst,float *ssit,float *def,
float *defr,float *np,float *net,float *avgpr,float *avgfedt,float *avgreg,float *avgovt,float *avggp,
float *avgsst,float *avgstt,float *avgnp,float *avgdef)//3.6
{
*empCount = *empCount +1;
*pr = *pr + *payrate;
*reg = *reg + *reghours;
*ovt = *ovt + *ovthours;
*gp = *gp + *gross;
*fedt = *fedt + *ft;
*stt = *stt + *st;
*sst = *sst + *ssit;
*def = *def + *defr;
*np = *np + *net;
*avgpr = *pr / *empCount;
*avgfedt = *fedt / *empCount;
*avgreg = *reg / *empCount;
*avgovt = *ovt / *empCount;
*avggp = *gp / *empCount;
*avgstt = *stt / *empCount;
*avgsst = *sst / *empCount;
*avgnp = *np / *empCount;
*avgdef = *def / *empCount;
}
void PrintSummaryReport(float pr,float reg,float ovt,float gp,float fedt,float stt,float sst,float def,float np,float avgpr,float avgreg,float avgovt,
float avggp,float avgfedt,float avgstt,float avgsst,float avgdef,float avgnp,FILE * ReportFile) //3.7
{
ReportFile = fopen("report.txt", "a");
fprintf(ReportFile,"\nTotals %17.2f%8.2f%10.2f%8.2f%8.2f%9.2f\n",pr,reg,gp,fedt,sst,np);
fprintf(ReportFile,"%32.2f%18.2f%8.2f\n",ovt,stt,def);
fprintf(ReportFile,"\nAverages %15.2f%8.2f%10.2f%8.2f%8.2f%9.2f\n",avgpr,avgreg,avggp,avgfedt,avgsst,avgnp);
fprintf(ReportFile,"%32.2f%18.2f%8.2f\n",avgovt,avgstt,avgdef);
fclose(ReportFile);
}
答案 0 :(得分：3)
我建议您使用'struct'将数据组合在一起，使其更具可读性。
e.g。
struct person {
char firstname[MAXLENNAME];
char lastname[MAXLENNAME];
...
};
然后，当您想使用qsort进行排序时，您可以创建一个将结构人员记录相互比较的函数。