#include 
#include 
typedef struct person 
{
        int id;
        char name[20];
        double hw;
        double project;
        double exam;
        double final;
        int percent;
        char grade;
}person;
int main()
{
        person p;
        FILE *fpIn;
        FILE *fpOut;
        int count
        
        fpIn = fopen("p5.dat", "r");  
        if (!fpIn)
        {
                printf("error opening input file\n");
                exit(1);
        }
        fpOut = fopen("p5out.dat", "w");
        fputs("Id       Name      Hw    Project   Exam   Final   Percent    Grade\n",fpOut);
        fputs("-------------------------------------------------------------------\n",fpOut);
        while ( fscanf(fpIn,sizeof(person),p) != EOF)//有問題 
        {
          fprintf(&p, sizeof(person), 1,fpOut);//有問題             }
         fclose(fpIn);
        fclose(fpOut);
        system("pause");
        return 0;
}      

引言: 1.在你的程式中沒看到讀檔,只看到開檔啊 2.一次讀一個學生資料,分析後存入struct,再存入p5out

#include 
#include 
typedef struct person 
{
        int id;
        char name[20];
        double hw;
        double project;
        double exam;
        double final;
        double percent;
        char grade;
}person;
int main()
{
        person p;
        FILE *fpIn;
        FILE *fpOut;
        int count;
        
        fpIn = fopen("p5.dat", "r");  
        if (!fpIn)
        {
                printf("error opening input file\n");
                exit(1);
        }
        fpOut = fopen("p5out.dat", "w");
        fputs("Id       Name                  Hw    Project   Exam   Final   Percent    Grade\n",fpOut);
        fputs("-------------------------------------------------------------------\n",fpOut);
        while ( fread(&p, sizeof(p),1,fpIn)!=NULL ) 
        {
             fwrite(&p, sizeof(p),1,fpOut);            }
         fclose(fpIn);
        fclose(fpOut);
        system("pause");
        return 0;
}      

引言: while ( fread(&p, sizeof(p),1,fpIn)!=NULL ) { fwrite(&p, sizeof(p),1,fpOut); }

 
#pragma hdrstop
#include 
#include 
#include 
typedef struct person
{
        int id;
        char name[20];
        double hw;
        double project;
        double exam;
        double final;
        double percent;
        char grade;
}person;    //---------------------------------------------------------------------------    #pragma argsused
int main(int argc, char* argv[])
{            person p[20];
        FILE *fpIn;
        FILE *fpOut;
        int count = 0;
        char msg[80],*token;
        int Para = 0;            fpIn = fopen("p5.dat", "r");  
        if (!fpIn)
        {
                printf("error opening input file\n");
                exit(1);
        }
        fpOut = fopen("p5out.dat", "w");
        fputs("Id       Name                  Hw    Project   Exam   Final   Percent    Grade\n",fpOut);
        fputs("-------------------------------------------------------------------\n",fpOut);
        while ( fgets(msg, sizeof(msg),fpIn)!=NULL )
        {
            fputs(msg,fpOut);
            token = strtok(msg," ");
            p[count].id = atoi(token);
            if ( (token = strtok(NULL," ")) != NULL); //引號內填入你要用來區隔的字元" "
                strcpy(p[count].name,token);
            if ( (token = strtok(NULL," ")) != NULL ); 
            {
                strcat(p[count].name," ");
                strcat(p[count].name,token);
            }
            if ( (token = strtok(NULL," ")) != NULL );                 p[count].hw = atof(token);
            if ( (token = strtok(NULL," ")) != NULL );                 p[count].project = atof(token);
            if ( (token = strtok(NULL," ")) != NULL );                 p[count].exam = atof(token);
            if ( (token = strtok(NULL," ")) != NULL ); 
                p[count].final = atof(token);
            count  ;
        }
         fclose(fpIn);
        fclose(fpOut);
        system("pause");
        return 0;
}
//---------------------------------------------------------------------------
 

引言: atoi(token); atof(token); strtok 還有我要算percent是不是這樣算 p[count].percent=(p[count].hw p[count].project p[count].exam p[count].final)/4; if ( (token = strtok(NULL," ")) != NULL ); p[count].percent = atof(token); ~還有我必須算出各科成績的全班總平均,所以我必須知道有幾個學生,也就是幾個欄位,欄位的算法是不是

引言: 我是在美國讀大學的學生,美國人的教法就是交個大概其他靠自己~我是很高興我又學到了新東西~但我們老師既然沒交strtok就要我們做,那就表示有其他的切割字串,分別依序放入 struct的方法,不知道有嗎?感謝你的教導~Thx~