Differences between scanf and getchar in C -

i trying explain friend c coding , asked me why code (with "scanf") didn't work.

#include

int main() { char x=scanf("%c",&x); printf("%c\n",x); return 0; } 

and 1 yes

#include <stdio.h>  int main() { int k; char x=getchar printf("%c\n",x); return 0; } 

when scanf completes, x contains character read. however, value overwritten when x assigned return value of scanf, number of items matched or eof in event of error.

if call scanf without assigning return value x should expected result.

for example, should work.

char x; scanf("%c",&x);