CODEWITHSUNDEEP
c
Kowsar Rahman
Kowsar Rahman

Reputation: 33

How to print a string in c language for like 10 seconds?

while(1) {
printf("Hello World");
}

We know this would keep on printing the Hello World string for infinite times. My goal is to print this for 10 seconds. I tried this:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main() {

    int ticks = clock();
    while(ticks <= 10000000000) {
        printf("Hello World\n");
    }

    return 0;
}

It still goes for an infinite time. Please let me where did I made the mistake.

Upvotes: 0

Views: 970

Answers (3)

Luis Colorado
Luis Colorado

Reputation: 12698

This code will print the string, then issue a '\r' to return the cursor to the left of the terminal, then issue a "\033[K" to erase from the cursor to the end of the line, and a '\n' to end the program on a new line (you can avoid this, as the cursor is already in an empty line)

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main()
{
    printf("Hello, world ");
    fflush(stdout); /* force a write(2) to output the string to the terminal */
    sleep(10);
    printf("\r\033[K\n"); /* carry return, escape to erase from the
                            * cursor to the end of the screen, and new
                            * line */
    return 0;
}

Upvotes: 0

Ted Lyngmo
Ted Lyngmo

Reputation: 117443

I mainly just want to print for like 10 seconds

Then I suggest using the standard time() function.

#include <stdio.h>
#include <time.h>

int main() {
    time_t end_time = time(NULL) + 10; // calculate the end time

    while(time(NULL) < end_time) { // loop until the end time is reached
        printf("Hello World\n");
    }
}

Upvotes: 2

4386427
4386427

Reputation: 44329

Maybe use time()

Save the start time in one variable. Have another variable with the current time and keep printing until the difference is what you want.

Like

#include <stdio.h>
#include <time.h>
#include <unistd.h>

int main(void) {
    time_t start = time(NULL);     // Get start time
    time_t current = start;
    while(current - start < 10) {  // Check difference
        printf("Hello World\n");
        // sleep(1);               // To limit amount of output if needed
        current = time(NULL);      // Update current time
    }
    return 0;
}

Upvotes: 1

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