Correct format specifier for return value of sizeof() in C

Question

I have the following code:

#include

int main()
{
    printf(\"The \'int\' datatype is \\t\\t %lu bytes\\n\", sizeof(int));
    printf(\"The \         


        

Answer 1

In C the type of a sizeof expression is size_t.

The printf specifier to use is %zu. Example:

printf("The 'int' datatype is \t\t %zu bytes\n", sizeof(int));

It has been possible to use this since the 1999 version of the C standard.