C code compilation problems in VS2010 - visual-studio-2010

Question

I'm trying to compile C programs in VS2010 Professional using cl.exe (64bit command line). Getting strange errors in VS2010 or VS2008. Same Code compiles & runs in GNU gcc without a problem (Cygwin). Any ideas? Can't go any further with the real thing until I understand the problem here. Thanks!
filename: testC.c
cl.exe testC.c
#include<stdio.h>
#include <stdlib.h>
typedef double Td;
int main(int argc, char *argv[])
{
FILE *fp;
if ( (fp=fopen("junk_out.txt","w")) == NULL ){
printf("Cannot open file.\n");
exit(1);
}
fprintf(fp,"%f \n",3.1420);
fclose(fp);
Td x=3.14;
Td *a;
a = &x;
printf("%f \n",a);
printf("%f \n",x);
printf("%f \n",*a);
return 0;
}
Here is the output:
testC.c(18): error C2275: 'Td' : illegal use of this type as an expression
testC.c(5) : see declaration of 'Td'
testC.c(18): error C2146: syntax error : missing ';' before identifier 'x'
testC.c(18): error C2065: 'x' : undeclared identifier
testC.c(18): warning C4244: '=' : conversion from 'double' to 'int', possible loss of data
testC.c(19): error C2275: 'Td' : illegal use of this type as an expression
testC.c(5) : see declaration of 'Td'
testC.c(19): error C2065: 'a' : undeclared identifier
testC.c(21): error C2065: 'a' : undeclared identifier
testC.c(21): error C2065: 'x' : undeclared identifier
testC.c(21): warning C4047: '=' : 'int' differs in levels of indirection from 'int *'
testC.c(22): error C2065: 'a' : undeclared identifier
testC.c(23): error C2065: 'x' : undeclared identifier
testC.c(24): error C2065: 'a' : undeclared identifier
testC.c(24): error C2100: illegal indirection

Answer 1

You have to define every variable at the top of a function if you compile your code with the C compiler from VS2010.
#include <stdio.h>
#include <stdlib.h>
typedef double Td;
int main(int argc, char *argv[])
{
FILE *fp;
Td x;
Td *a;
if ( (fp=fopen("junk_out.txt","w")) == NULL )
{
printf("Cannot open file.\n");
exit(1);
}
fprintf(fp,"%f \n",3.1420);
fclose(fp);
x=3.14;
a = &x;
printf("%f \n",a);
printf("%f \n",x);
printf("%f \n",*a);
return 0;
}
In C++ you can define everywhere you want.