It's above the Enter key on your keyboard with '\' symbol.....................

since you declare x as an integer so system allocate 2 byte for this variable & when u give input as character it converts into an integer through ASCII value & print that one.............

#include<stdio.h>
#include<string.h>
#define size 25

void main()
{
char strsrc[size];
char strtmp[size];

clrscr();

2) This is an L-value error that u have to put a reference that have a legal address at the left side of assignment operator at the equal sign..........

u can see ur result by pressing ctrl+f5 or u can see ur result by adding a simple "getch();"
in ur code...........................