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060. 整数の２乗と浮動小数点数２乗 (関数マクロ)

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#include <stdio.h>

#define sqr(x) ((x) * (x))

int sqr_int(int x)
{
    return x * x;
}
double sqr_double(double x)
{
    return x * x;
}
int main(int argc, char* argv[])
{
    int    nx = 3;
    double dx = 4.25;

    printf("%d * %d = %d\n", nx, nx, sqr_int(nx));
    printf("%d * %d = %d\n", nx, nx, sqr(nx));
    putchar('\n');

    printf("%lf * %lf = %lf\n", dx, dx, sqr_double(dx));
    printf("%lf * %lf = %lf\n", dx, dx, sqr(dx));
    putchar('\n');

    return 0;
}

R:\>lesson060\Project1.exe
3 * 3 = 9
3 * 3 = 9

4.250000 * 4.250000 = 18.062500
4.250000 * 4.250000 = 18.062500

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