Dev C++ to compile C source file

How can I use Dev C++ to compile C source file. I thought it would automatically do it, but for some reason it compiles with several errors and I think its because you have to make changes for it to compile a C file.

Example test code:

 #include <stdio.h>



main ()        
{ int i,j;
double x,x_plus_one();
char ch;

i = 0;
x = 0;

printf (" %f", x_plus_one(x));
printf (" %f", x);

j = resultof (i);

printf (" %d",j);
}


double x_plus_one(x)          

double x;

{
  x = x + 1;
  return (x);
}


resultof (j)             

int j;

{
   return (2*j + 3);       
}

From stackoverflow

• That is pre-ANSI code. I'm not sure the gcc compiler supports it, and in any case it is bad practice to use it. Change your function to:

  double x_plus_one( double x) {
    x = x + 1;
    return (x);     
  }
  

  and you will need to declare it as:

  double x_plus_one( double x);
  

  You may also want to try compiling with the -traditional flag, but I haven't tested this.

  TStamper : but I check to support all ANSI support in compiler options

  anon : my point is, it ISN'T ANSI code

  TStamper : I guess I assumed that took care of it, but I guess not

  TStamper : same went for other function, guess that old way won't work as you said

• Change main to int main() as well. And Do the modification as Neil pointed out.

  TStamper : that is not needed, because in C the default will always assume int