need c program

[auryc]

Hello world,

I would be very gracefull if someone could send me a program with some math algorithms, which calculates smth (no matter what) but do it long, for some seconds. Please help for c newbie.

Thanks

[laserlight]

Here you go:

#include <time.h>

int main(void)
{
    time_t start = time(0);
    while (difftime(time(0), start) < 3);
    return 0;
}

[hilarius]

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>

int main(){
	int i;
	int j;
	int k;
	for(i = 0; i < 30000; i++)
		for(j = 0; j < 30000; j++)	
			for(k = 0; k < 30000; k++){
			}
	printf("%d", 1+1);
	return 0;
}

This calculates the number 2 (as the sum of 2 integers) but it takes a while to do so.

[quzah]

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>

int main(){
	int i;
	int j;
	int k;
	for(i = 0; i < 30000; i++)
		for(j = 0; j < 30000; j++)	
			for(k = 0; k < 30000; k++){
			}
	printf("%d", 1+1);
	return 0;
}

This calculates the number 2 (as the sum of 2 integers) but it takes a while to do so.

You might want to do something inside the loop, otherwise your compiler may just optimize all three loops away to nothing.

while( time( NULL ) != -1 )
    printf("thinking...\n");
printf("got it! 1+1 is %d!\n", 1+1 );

Quzah.

[vart]

This calculates the number 2 (as the sum of 2 integers) but it takes a while to do so.

And maybe not - if compile optimization is on

[hilarius]

Aww... this thread is becoming like my nickname....

[auryc]

thanks for that

But it be nice if code would be ~100 or more lines..

[laserlight]

But it be nice if code would be ~100 or more lines..

Looks like you did not get the drift. Read the homework guidelines and do your own homework before asking for help.

*thread closed*