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10 lines
240 B
C++
10 lines
240 B
C++
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#include <cmath>
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#include <cstdio>
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int main(void)
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{
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double x[2], y[2];
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while (scanf("%lf%lf%lf%lf", x, y, x+1, y+1) != EOF)
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printf("%.2f\n", sqrt((x[1]-x[0])*(x[1]-x[0]) + (y[1]-y[0])*(y[1]-y[0])));
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return 0;
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}
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