Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.

提供一个参考程序： C语言： #include"cstdio" ///也可以使用 < > int main() { int a,b; while(scanf("%d %d", &a,&b) != EOF) ///EOF:end of file 文件结束标志 { if(a==0 && b==0) break; printf("%d\n", a+b); } return 0; } C++: #include"iostream" ///也可以使用 < > using namespace std; int main() { int a,b; while(cin >> a >> b) { if(a==0 && b==0) break; cout << a+b << endl; } return 0; }