按格式讀寫檔案 小例項
阿新 • • 發佈：2019-01-22
/************
計算平均分，並寫到文字中
*************
#include <stdio.h>
#include <stdlib.h>#define N 30
typedef struct date_order{
int year;
int month;
int day;
}DATE;
typedef struct student
{
long studentID;
char studentName[10];
char studentSex;
DATE birthday;
int score[4];
float aver;
}STUDENT;
void InputScore(STUDENT stu[],int n,int m)
{
int i,j;
for(i = 0;i<n;i++)
{
printf("Input record %d:\n",i+1);
scanf("%ld",&stu[i].studentID);
scanf("%s",&stu[i].studentName);
scanf(" %c",&stu[i].studentSex);
scanf("%d",&stu[i].birthday.year);
scanf("%d",&stu[i].birthday.month);
scanf("%d",&stu[i].birthday.day);
for(j=0;j<m;j++)
{
scanf("%d",&stu[i].score[j]);
}
}
}
void AverScore(STUDENT stu[],int n,int m)
{
int i,j,sum[N];
for(i=0;i<n;i++)
{
sum[i] = 0;
for(j=0;j<m;j++)
{
sum[i] = sum[i] + stu[i].score[j];
}
stu[i].aver = (float)sum[i]/m;
}
}
void WritetoFile(STUDENT stu[],int n,int m)
{
FILE *fp;
int i,j;
if((fp = fopen("score.txt","w")) == NULL)
{
printf("Failuer to open score.txt\n");
exit(0);
}
for(i=0;i<n;i++)
{
fprintf(fp,"%10ld %8s %3c %6d / %2d / %2d",stu[i].studentID,
stu[i].studentName,
stu[i].studentSex,
stu[i].birthday.year,
stu[i].birthday.month,
stu[i].birthday.day
);
for(j = 0;j < m;j++)
{
fprintf(fp,"%4d",stu[i].score[j]);
}
fprintf(fp,"%6.1f\n",stu[i].aver);
}
fclose(fp);
}
int main()
{
STUDENT stu[N];
int n;
printf("How many student?\n");
scanf("%d",&n);
InputScore(stu,n,4);
AverScore(stu,n,4);
WritetoFile(stu,n,4);
return 0;
}