Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:13:16: error: two or more data types in declaration of ‘sum’ double double sum,temp; ^ user.cpp:13:20: error: two or more data types in declaration of ‘temp’ double double sum,temp; ^ user.cpp:17:3: error: ‘sum’ was not declared in this scope sum=0; ^ user.cpp:22:13: error: ‘temp’ was not declared in this scope {count++;temp=8-i-1;sum+=pow(2,temp);} ^ user.cpp:11:16: warning: unused variable ‘c’ [-Wunused-variable] long long int c=0,count=0,a[7500],counter=0,nr=0; ^