His C program is actually a C++ one. C does not allow declaration of variables in the for loop (i.e. 'int i;' line has to precede the for statement). Better not

His C program is actually a C++ one. C does not allow declaration of variables in the for loop (i.e. 'int i;' line has to precede the for statement). Better not to take any programming advices from someone who can't tell C from C++.