Errors due to including of stdio header file

This is code for showing temperature sensed value of UART0 of lpc2138

#include <stdio.h>
#include"LPC213.h" // Define LPC2148 Header File

#define CR 0x0D
#define DONE 0x80000000
#define START 0x01000000
#define PRESET 0x00230600

void Delay ();
void init_serial (void);
int putchar (int ch);
int getchar(void);
int main ()
{ unsigned long Val;
char *Ptr = "Current Temperature is:";
VPBDIV = 0x02; //pclk @ 30MHz
init_serial();
PINSEL1 = 0x01 << 24; //P0.28 configure as ADC0.1
AD0CR = PRESET | 0x02;
AD0CR |= START; //Start Conversion NOW
while (1)
{ do
{ Val = AD0GDR;
} while ((Val & DONE) == 0);
Val = ((AD0GDR >> 6) & 0x3FF);
while (*Ptr)
{ putchar(*Ptr++);
} printf ("%4d ", Val);
putchar(getchar()); // Echo terminal

}
//printf ("\xF8\F \r");
}

void Delay ()
{ unsigned int i,j;
for (i=0;i<50;i++)
for (j=0;j<500;j++);
}

void init_serial (void)
{ PINSEL0 = 0x00000005; // Enable RxD0 and TxD0
U0LCR = 0x00000083; //8 bits, no Parity, 1 Stop bit
U0DLL = 0x000000C3; //9600 Baud Rate @ 30MHz VPB Clock
U0LCR = 0x00000003;
} int putchar (int ch)
{ if (ch == '\n')
{ while (!(U0LSR & 0x20));
U0THR = CR;
} while (!(U0LSR & 0x20));
return (U0THR = ch);
} int getchar(void)
{ while (!(U0LSR & 0x01));
return (U0RBR);
}

This is the above code which shows following errors when I add studio.h header file in code

compiling adc.c...
adc.c(9): warning: #1295-D: Deprecated declaration Delay - give arg types
adc.c(11): error: #79: expected a type specifier
adc.c(12): error: #55: too many arguments in macro invocation
adc.c(12): error: #79: expected a type specifier
adc.c(55): error: #79: expected a type specifier
adc.c(55): error: #141-D: unnamed prototyped parameters not allowed when body is present
adc.c(65): error: #55: too many arguments in macro invocation
adc.c(65): error: #79: expected a type specifier
adc.c(65): error: #141-D: unnamed prototyped parameters not allowed when body is present
Target not created

And if I dont add studio.h header file then printf function doesn't work.
What should I do in this case? I guess I need printf function in order to print ADC value to the UART terminal.