0_0_33322105_12289.cpp: In function 'int main()': 0_0_33322105_12289.cpp:6:9: error: 'a' was not declared in this scope int n=0;a=0;sum=1; ^ 0_0_33322105_12289.cpp:6:13: error: 'sum' was not declared in this scope int n=0;a=0;sum=1; ^