Multiple Counter Problem In For Loop

Question

Why is this not valid

for( int i = 0, int x = 0; some condition; ++i, ++x )

and this is

int i, x;
for( i = 0, x = 0; some c         


        

Answer 1

this works:

for( int i = 0, x = 0; some condition; ++i, ++x )

it's a variable declaration:

int i, j; // correct
int i, int j; // wrong, must not repeat type