linux - Comparing four numbers in C -

i wrote simple digits comparison program in c, while compiling throwing me error message stating

**/tmp/ccx3x0ai.o: in function `main': 3e.c:(.text+0x11): undefined reference `printf' collect2: ld returned 1 exit status** 

the program

**#include<stdio.h>  int main()  {     int a, b, c, d ;     printf ( "enter 4 numbers" ) ;     scanf ( " enter 1) %d, \n enter 2) %d, \n enter 3) %d, \n enter 4) %d ", &a , &b, &c, &d ) ;      if ( >= b )         {             if ( c >= d )                 {                     if ( c >= )                         {                             printf ( "enter c greater" ) ;                         }                     else                          {                             printf ( "enter greater" ) ;                         }                 }             else                  {                     if ( d >= a)                         {                             printf ( "enter d greater" ) ;                         }                     else                          {                             printf ( "enter greater" ) ;                         }                 }         }      else          {             if ( c >= d )                 {                     if ( c >= b)                         {                             printf ( "enter c greater" ) ;                         }                     else                          {                             printf ( "enter b greater" ) ;                         }                 }             else                  {                     if ( d >= b )                         {                             printf ( "enter d greater" ) ;                         }                     else                          {                             printf ( "enter b greater" ) ;                         }                 }         } } ** 

i'm not sure point error. @ same time i'm trying write same code using conditional operators in c.

you have typo in middle line here:

int a, b, c, d ; printf ( "enter 4 numbers" ) ; scanf ( " enter 1) %d, \n enter 2) %d, \n enter 3) %d, \n enter 4) %d ", &a , &b, &c, &d ) ; 

it should small p in printf => printf