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Fibonacci sequence wont run.

This is the second problem from Project Euler. here the detail:

Quote:

__Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:__

Quote:

__1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...__

__By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms__.

and here is my code in C:

Code:

`#include <stdio.h>`

int main()

{

int sum = 0, a = 1, b = 2, c=0;

while(b<4000000)

{

c=a+b;

if ( c%2==0 )

{

continue;

if (c<4000000)

{

sum=sum+c;

}

}

a = b;

b = c;

}

sum=sum+1;

printf ("%d", sum);

return 0;

}

Compiling run without error, however when i run the program(.exe file) from command prompt, it do nothing. I dont know what to do next, since there is no error statement to look at.

Here the attachment if it help.