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View Compilation Error

0_0_19141694_25454.cpp: In function 'int main()':
0_0_19141694_25454.cpp:14:19: error: 'a' was not declared in this scope
     while (cin >> a >> b){
                   ^
0_0_19141694_25454.cpp:14:24: error: 'b' was not declared in this scope
     while (cin >> a >> b){
                        ^


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