16 lines
346 B
C
16 lines
346 B
C
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#include <math.h>
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#include <stdio.h>
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int main(void) {
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// initialize variables
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double a, b, c, d;
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scanf("%lf %lf %lf %lf", &a, &b, &c, &d);
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// trinary expression magic. same as above
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(b * c - d < 1e-6 && b * c - d > -1e-6) ? printf("error")
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: printf("%.1lf", a / (b * c - d));
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return 0;
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}
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