Unplug the refrigerator. Mark the wires so you know where they go into the switch. Take out the switch and tube. Go to an appliance parts store with the switch and tube and the model and serial number of the refrigerator and get a new part. Do not kink, bend, or fold the new tube as you carry it home or install it.
A string variable is an array of characters. char a[10]; Which can hold any string value , that has a lenght less than or equal to the size of the character array. Whereas a string constant , is a particular string .
A C string is usually declared as an array of char. However, an array of char is NOT by itself a C string. A valid C string requires the presence of a terminating null character (a character with ASCII value 0, usually represented by the character literal '\0'). Since char is a built-in data type, no header file is required to create a C string.