JamesH65
commented
4 years ago https://stackoverflow.com/questions/2524611/how-can-one-print-a-size-t-variable-portably-using-the-printf-family would seem to indicate %zu is appropriate for architecture agnostic code (ie 32 and 64)
Were you compiling on a 64bit system?
ghost
popcornmix
This fixes the warning
format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘size_t’ {aka ‘long unsigned int’}