try yourself |run program

#include <stdio.h> 
#include <string.h> 
#include <conio.h> 

void main(){ 
int i; 
 char str[50]={'c','o','m','s','y','s','a','p','p','.','c','o','m','\0'}; 
 clrscr();
 for(i=0;i<=12;i++){ 
  printf("\n str[%d] = %c",i,str[i]); 
 }
 getch();
}

Program Output

str[0] = c
str[1] = o
str[2] = m
str[3] = s
str[4] = y
str[5] = s
str[6] = a
str[7] = p
str[8] = p
str[9] = .
str[10] = c
str[11] = o
str[12] = m