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#include <time.h>#include <math.h>int main(const int argc, const char* argv) {    clock_t t;    float f = 2.0f;    float s1, s2;        t = clock();    for(int i=0;i<100000000;i++) {        s1 = powf(f, 2);    }    t  = clock() - t;    s1 = (float)t / CLOCKS_PER_SEC;    t = clock();    for(int i=0;i<100000000;i++) {        s2 = f * f;    }    t = clock() - t;    s2 = (float)t / CLOCKS_PER_SEC;    return 0;}