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Evening :)

I am trying to run a makefile on a program i wrote.
in Borland C it runs smoothly .
after running the makefile - all sorts of error appear which i do not understand.
i am adding the files (program + header + error DOC ) .

Makefile as written :

hw_2 : ex.o main.o
gcc -o hw_2 ex.o main.o
ex.o : hw2head.c hw2head.h
gcc -c -x c hw2head.c
main.o : hw2cpy.c hw2head.h
gcc -c -x c hw2cpy.c[


Thank you in advance ,

Yotam , Israel.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
//#include <conio.h>
#include <math.h>
#include "hw2head.h"

int main()
{
university univ={0};
char user_choice;
FILE *in,*out;
int num_of_std,flag_a=0,flag_b=0;

//clrscr();
univ.ptr=(student*)malloc(NUM *sizeof(student));

while (user_choice!='z')
{   user_choice=show_menu();
switch (user_choice) {
   case 'a':
	{
	in=fopen("input.txt","r+");
	if (in==NULL)
		{
		fprintf(stderr,"can't open file");
		getch();
		break;
		}
	num_of_std=make_file(in,&univ);
	fclose(in);
	printf("finished kelet\n");
	flag_a=1;
	break;
	}
   case 'b':
	{
	if ((out=fopen("output.txt","wt"))==NULL)
		{
		fprintf(stderr,"can't open file");
		getch();
		break;
		}
	if ((flag_a!=1) || (flag_b==1))
		{
		fprintf(out,"Not Available");
		printf("You Didn't Select In The Right Order\n");
		getch();
		exit(1);
		}

	write_file(out,&univ,num_of_std);
	flag_b=1;
	fclose(out);
	printf("finished writing file , i am having a coffee break \n");
	break;
	}
case 'c':
	{
	if ((in=fopen("output.txt","w+"))==NULL)
		{
		fprintf(stderr,"can't open file");
		getch();
		exit(1);
		}
	if ((flag_a!=1) || (flag_b!=1))
		{
		fprintf(out,"Not Available");
		printf("You Didn't Select In The Right Order\n");
		getch();
		exit(1);
		}
	grade_factor(in,&univ,num_of_std);
	fclose(in);
	printf("finished factoring grades \n");
	break;
	}
case 'z':
       {
       out=fopen("output.txt","w+");
       fprintf(out,"END_OF_PROGRAM");
       fclose(out);
       printf("Program Terminated\n");
       getch();
       exit(1);
       }
   }
  flushall();
 }

realloc(univ.ptr,0);
clrscr();
return 0;
}

// FUNCTIONS //
char* grade_bit; //Global Pointer , saving Grades after HW check 
char show_menu()
  {
  char key_strike;

   printf("Welcome to University system \nChoose Operation :\n");
   printf(" 'a' - Create File in Current Path and start Input \n");
   printf(" 'b' - Create File in Current Path according to HW submission \n");
   printf(" 'c' - Show Factored Grades of students \n");
   printf(" 'z' - Exit Program and have a cup of coffee \n\n\n\n\n" );
   key_strike=getchar();
   return key_strike;
  }

int make_file(FILE *in,university *un)
  {
  char buff[BUFSIZ];
  int  count=0,i;

  while ( fgets( buff, sizeof(buff), in ) != NULL ) {
    student s;
    if ( sscanf( buff, "%s %ld %f %s",
		 s.name, &s.id, &s.avg, s.hw_submit ) == 4 ) {
      /* success decode, extend array and copy the info */
      student *temp = (student*)realloc( un->ptr, (count+1)*sizeof(student) );
      if ( temp != NULL ) {
	un->ptr = temp;          /* update array */
	un->ptr[count] = s;      /* copy data */
	count++;                 /* one more stored */
      } else {
	/* no more room, return with what we have */
	return count;
      }
    } else {
      /* that line didn't make sense, report it */
      fprintf( stderr, "Bad line %s", buff );
    }
  }
  return count;

}

void write_file(FILE *out,university *un,int num)
{
int i,j,count;
char grade;

grade_bit=(char*)malloc(num*sizeof(char));
if (grade_bit==NULL)
   { printf("No Memory for new grades , now EXIT \n"); getch(); exit(1); }
 for(i=0;i<num;i++)
   {
   count=0; grade='0';
   fprintf(out,"student : %s %ld %.2f ",un->ptr[i].name,un->ptr[i].id,un->ptr[i].avg);
   for (j=0;j<5;j++)
     {
       if ((char)un->ptr[i].hw_submit[j]=='1') count+=1;
     }
     if (count<3) fprintf(out,"%c",grade);
	else { grade='1' ; fprintf(out,"%c",grade); }
     grade_bit[i]=grade;
   fprintf(out,"\n");
   }
}

void grade_factor(FILE* in,university *un,int num)
{
 float max_grade;
 int i;

max_grade=un->ptr[0].avg;
for (i=1;i<num;i++)
  {
   if (un->ptr[i].avg>max_grade)
    {
    max_grade=un->ptr[i].avg;
    }
  }
for (i=0;i<num;i++)
    {

    fprintf(in,"student : %s %ld ",un->ptr[i].name,un->ptr[i].id);
    if (un->ptr[i].avg==max_grade) un->ptr[i].avg=100;
       else un->ptr[i].avg=((un->ptr[i].avg)*100)/max_grade;

    fprintf(in,"%.2f %c \n",un->ptr[i].avg,grade_bit[i]);
    }
free(grade_bit);

}
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <conio.h>
#include <math.h>
#define NUM 5

typedef struct { // Student Structure //
char name[15];
long id;
float avg;
unsigned char hw_submit[5];
} student;

typedef struct { //University Structure //
student* ptr;
} university;

static void forcefloat (float *p)    /* fixing scanf floating point */
{
 float f = *p;
 forcefloat(&f);
}

char show_menu(); //Menu Function
int make_file(FILE *in,university *un); // Reading Input File
void grade_factor(FILE* in,university *un,int num); //Re-Writing after Factor Grades
void write_file(FILE *out,university *un,int num); // Writing File after HW check
yotamix.doc (22.5 KB)
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  • Latest Post Latest Post by Ancient Dragon
Member Avatar for Ancient Dragon

why doesn't hw2head.c contain any includes? Add hw2head.h to the top of hw2head.c and that will probably fix all (or most) of the problems.

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