0_0_39244647_5418.cpp: In function 'int main()': 0_0_39244647_5418.cpp:7:11: error: 'a' was not declared in this scope 7 | while(a,b!=EOF) | ^ 0_0_39244647_5418.cpp:7:13: error: 'b' was not declared in this scope 7 | while(a,b!=EOF) | ^