Main.cc: In function 'int main()':
Main.cc:4:16: error: 'c' was not declared in this scope
int a=2,b=1;c,n,sum=0,i;
^
Main.cc:4:18: error: 'n' was not declared in this scope
int a=2,b=1;c,n,sum=0,i;
^
Main.cc:4:20: error: 'sum' was not declared in this scope
int a=2,b=1;c,n,sum=0,i;
^
Main.cc:4:26: error: 'i' was not declared in this scope
int a=2,b=1;c,n,sum=0,i;
^