Error(s):

source_file.c:5:15: error: unknown type name ‘uint64_t’
 void aProgram(uint64_t a, uint64_t b)
               ^
source_file.c:5:27: error: unknown type name ‘uint64_t’
 void aProgram(uint64_t a, uint64_t b)
                           ^
source_file.c: In function ‘main’:
source_file.c:34:4: warning: implicit declaration of function ‘aProgram’ [-Wimplicit-function-declaration]
    aProgram(11111111, 22222222);
    ^