Please, someone explain me why when I compile this code in Dev-C++ (Windows OS) the following error message apears: 'clrscr' undeclared (first use this function)

int main()
{ int c;
char d;
clrscr();
printf(' Example program for PSC232 n');
setup();

printf('*IDN?nr');
send('*IDN?n');
printf('RECEIVE..nr');
loop:
receive();

goto loop;
}

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ps: ignore the functions setup, send and receive

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jmangu

Dev C Printf Undeclared Key

I've just found a way to solve the problem. Include the stdlib library (#include <stdlib.h>;) and instead of clrscr(); code replace for system('cls'); and voilá it works.

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P: n/a

Just starting with C, can somebody explain why this does not work or
point me in the right direction? I wrote some tools and did some
coding but cant seem to get this one. I DID declare my FILE *fp! and
still get..
isource2.c: In function `getval':
isource2.c:5: `FILE' undeclared (first use in this function)
Here is my Example project:
$ls
Makefile file1 isource2.c isource2.h source1.c
$cat source1.c
#include <stdio.h>
#include 'isource2.h'
main()
{
int val;
val = getval();
printf('in main: %dn', val);
}
$cat isource2.c
int
getval(void)
{
FILE *fp;
int val;
fp = fopen('file1', 'r');
fscanf(fp, '%u', &val);
printf('in getval: %dn', val);
fclose(fp);
return (int) (val);
};
$cat isource2.h
int getval(void);
$cat file1
50
$cat Makefile
testtool: source1.o isource2.o
gcc -o source1 source1.o isource2.o
source1.o: source1.c isource2.h
gcc -g -c source1.c
isource2.o: isource2.c
gcc -g -c isource2.c
$make
gcc -g -c source1.c
gcc -g -c isource2.c
isource2.c: In function `getval':
isource2.c:5: `FILE' undeclared (first use in this function)
isource2.c:5: (Each undeclared identifier is reported only once
isource2.c:5: for each function it appears in.)
isource2.c:5: `fp' undeclared (first use in this function)
make: *** [isource2.o] Error 1
Don't understand, please explain - this should work, according to me
it's straigt forward! Isn't it????
Greetz.

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Nov 13, 2005 FILE undeclared - but its not, according to me. C / C Forums on Bytes.

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Aug 05, 2010 Can we call an undeclared function in C? Can we access global variable if there is a local variable with same name? Can we use function on left side of an expression in C and C? Can we access private data members of a class without using a member or a friend function? How to make a C class whose objects can only be dynamically allocated? May 30, 2013 Hmm I'm still fairly new to c myself only 3 weeks in and I haven't had to use that header for my programs yet. With problem 2 your are typing a meal out but what you are telling your program with int is that you would input a whole number value. Sep 26, 2012 Hellow, kevin thedevil. You cannot write simply cout, because Dev-C thinks cout is a variable.You must write the program thus: include.

Dev C++ Printf Undeclared