4918
5880
3万
GROAD
曲径通幽,安觅芳踪。
#include <math.h> double sqrt(double x);
#include <stdio.h> #include <math.h> int main() { double root; root = sqrt(25); printf ("the root is %f\n", root); return 0; }
./sqrt the root is 5.000000
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