pin.cpp: In function 'int main()': pin.cpp:10: warning: statement has no effect pin.cpp:11: warning: statement has no effect pin.cpp:12: warning: statement has no effect pin.cpp:13: warning: statement has no effect pin.cpp:14: warning: statement has no effect pin.cpp:15: warning: statement has no effect pin.cpp:16: warning: statement has no effect pin.cpp:17: warning: statement has no effect pin.cpp:18: warning: statement has no effect pin.cpp:19: warning: statement has no effect pin.cpp:20: warning: statement has no effect pin.cpp:21: warning: statement has no effect pin.cpp:22: warning: statement has no effect pin.cpp:23: warning: statement has no effect pin.cpp:24: warning: statement has no effect pin.cpp:25: warning: statement has no effect pin.cpp:26: warning: statement has no effect pin.cpp:27: warning: statement has no effect pin.cpp:28: warning: statement has no effect pin.cpp:29: warning: statement has no effect pin.cpp:30: warning: statement has no effect pin.cpp:31: warning: statement has no effect pin.cpp:32: warning: statement has no effect pin.cpp:33: warning: statement has no effect pin.cpp:34: warning: statement has no effect pin.cpp:35: warning: statement has no effect pin.cpp:6: warning: unused variable 'nrd' pin.cpp:6: warning: unused variable 'a' pin.cpp:6: warning: unused variable 'b' pin.cpp:6: warning: unused variable 'c' pin.cpp:6: warning: unused variable 'd'