0_0_38352450_19484.cpp: In function 'int main()':
0_0_38352450_19484.cpp:8:41: error: 'pow' was not declared in this scope
double res = sqrt(pow((a[0] - a[2]), 2) + pow((a[1] - a[3]), 2));
^
0_0_38352450_19484.cpp:8:66: error: 'sqrt' was not declared in this scope
double res = sqrt(pow((a[0] - a[2]), 2) + pow((a[1] - a[3]), 2));
^
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