#include <stdio.h> main() { int i = 10; long j = 10; double f = 10.0; char *s = "Hello World"; printf("sizeof(i): %lu\n", sizeof(i)); // 4 printf("sizeof(j): %lu\n", sizeof(j)); // 8 printf("sizeof(f): %lu\n", sizeof(f)); // 8 printf("sizeof(s): %lu\n", sizeof(s)); // 8 }