wts EOF AND IS SCANF returen values?

wts d/f b/w celloc() and melloc() fn

plz explain it i can't understend

wts RTE and main () return value to whome???

who call the main function

aarthivg#include<stdio.h> #include<stdlib.h> int main() { int a,b,sub; printf(" enter the value of a"); scanf("%d",&a); printf("enter the value of b"); scanf("%d",&b); sub=a-b; printf(" %d",&sub); //error// return 0; } just tried out...

last line should be printf("%d",sub);

int main() return value to whom??

i know very well but i want to get understend with exmple

what d/f b/w float and double datatype