Compilare: user.cpp: In function ‘int main()’: user.cpp:41:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(i=nrp;i>=1;--i) ^~~ user.cpp:48:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ if(prime[a] >=l && prime[a]<=r && prime[b]>=l && prime[b]<=r && prime[a]!=prime[b]) ^~