Can anyone tell me why this C read file is not working? *will give medal and fan*

Question

itiaax · Answer

void class_rep()
{
	FILE *studentdataPtr;
		
	studentdataPtr = fopen("studentdata.txt", "r");
	
		
	if (studentdataPtr == NULL)
	{
		printf("There has been a file error.");
		exit(0);
	}
	else
		{
			printf("

------------------------------------------------------------------------------------------------");
			printf("

ROLL #	Name			M	G	C	G	S	BS	Avg");
			printf("

------------------------------------------------------------------------------------------------");
			
			for (student_counter=1; student_counter <= tot_students; student_counter++)
				{	
				
					fscanf(studentdataPtr, "
%2d	%s			%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f", &student_counter, s[student_counter].name, &s[student_counter].maths, &s[student_counter].grammar, &s[student_counter].composition, &s[student_counter].gen_studies, &s[student_counter].science, &s[student_counter].basic_span, &s[student_counter].student_average);
					printf("
%2d	%s			%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f", student_counter, s[student_counter].name, s[student_counter].maths, s[student_counter].grammar, s[student_counter].composition, s[student_counter].gen_studies, s[student_counter].science, s[student_counter].basic_span, s[student_counter].student_average);
				
		
				}
			
		}
	fclose(studentdataPtr);

itiaax · Answer

When I run the program..nothing shows up except for the first two printf statements

unklerhaukus · Answer

```
:3:2: error: use of undeclared identifier 'FILE'
        FILE *studentdataPtr;
        ^
```

itiaax · Answer

@UnkleRhaukus ..it's a snippet of my entire code..I already declared that file before in my write file (which I did not include)

unklerhaukus · Answer

well i dont know how to run you code without the FILE

itiaax · Answer

void store_stud_info()
{

	FILE *studentdataPtr;
		
	studentdataPtr = fopen("studentdata.txt", "w");
	
		
	if (studentdataPtr == NULL)
	{
		printf("There has been a file error.");
	}
		else
		{
			fprintf(studentdataPtr, "

----------------------------------------------------------------------------------------------------------");
			fprintf(studentdataPtr,"

ROLL #	Name			M	G	C	G	S	BS	Avg");
			
			for (student_counter=1; student_counter <= tot_students; student_counter++)
			{	
				fprintf(studentdataPtr,"

----------------------------------------------------------------------------------------------------------");
				fprintf(studentdataPtr, "
%2d	%s			%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f	%4.1f", student_counter, s[student_counter].name, s[student_counter].maths, s[student_counter].grammar, s[student_counter].composition, s[student_counter].gen_studies, s[student_counter].science, s[student_counter].basic_span, s[student_counter].student_average);
			}
		}
		fclose(studentdataPtr);
}

itiaax · Answer

There is the write file

unklerhaukus · Answer

sorry, i still can't get it to run 
(im still learning C)

itiaax · Answer

Okay, thanks nevertheless.