How do you print a string using putchar?

Answer 1

You would iterate over all characters within the string, printing each character with the putchar function. In C, strings are terminated with a null byte, so you'd stop when that null byte has been reached.

Example:

void printme(const char* me) {

while (*me) {

putchar(*me++);

}

}

Needless to say this method is inefficient compared to using API that outputs the entire string at once, but the general approach of iterating over all characters in a string is used frequently.

Answer 2

if v write the data directly into video memory then will need not to have any display function.