how to assign the data to char array in c code example

Example 1: c add char to char array

char str[1024] = "Hello World";
char tmp[2] = "."; 		//Has to be of size 2 because strcat expects a NULL terminated string

strcat(str, tmp);

Example 2: c modify char array

char name_buf[5] = "Bob";
name_buf = "Alice";   // error
strcpy(name_buf, "Alice");