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operatory_time.c
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operatory_time.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
/* Program porownujacy czasy operacji arytmetycznych na typie int i float. */
int main(int argc,char **argv)
{
int n = 100000,i,k;
float x = 1.1, y=1.1, t1, x0;
clock_t tik,tak;
x0=1.1;
if(argc > 1 ) n = atoi(*(argv+1));
printf("n=%d x 100\n",n);
i=0;
tik=clock();
while(i < n)
{
k=0;
while(k<100)
{
x=x0;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
x = x * y;
k = k + 1;
}
i = i + 1;
}
tak=clock();
t1=((float)(tak-tik)/CLOCKS_PER_SEC);
printf("float * %f [%f]\n",t1,x);
i=0;
tik=clock();
while(i < n)
{
k=0;
while(k<100)
{
x=x0;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
x = x / y;
k = k + 1;
}
i = i + 1;
}
tak=clock();
t1=((float)(tak-tik)/CLOCKS_PER_SEC);
printf("float / %f [%f]\n",t1,x);
i=0;
tik=clock();
while(i < n)
{
k=0;
while(k<100)
{
x=x0;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
x = x + y;
k = k + 1;
}
i = i + 1;
}
tak=clock();
t1=((float)(tak-tik)/CLOCKS_PER_SEC);
printf("float + %f [%f]\n",t1,x);
i=0;
tik=clock();
while(i < n)
{
k=0;
while(k<100)
{
x=x0;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
x = x - y;
k = k + 1;
}
i = i + 1;
}
tak=clock();
t1=((float)(tak-tik)/CLOCKS_PER_SEC);
printf("float - %f [%f]\n",t1,x);
return 0;
}