0_0_17645403_25809.cpp: In function 'int main()': 0_0_17645403_25809.cpp:37:7: error: 's' was not declared in this scope s=gc2; ^ 0_0_17645403_25809.cpp:41:15: error: 's' was not declared in this scope gc2=gcd(s,a[j]); ^