ctimeprintfsleepseconds

Print out seconds on screen by replacing them without clear screen

I've tried but still dont know yet. I want to print out the result like this: seconds(10) -> seconds(9) -> ... -> seconds(1) by replacing each integer in every second without system("cls").

sample program

Solution

  • You could print \r to return the cursor to the beginning of the line.

    Example:

    #include <stdio.h>
#include <threads.h>

int main() {
    struct timespec st = {.tv_sec = 1, .tv_nsec = 0};

    for(int i = 10; i>=0; --i) {
        printf("%2d\r", i);    // \r to return to the beginning of the line
        fflush(stdout);        // flush to ensure it's actually printed

        thrd_sleep(&st, NULL); // sleep a second
    }
}