123.cpp: In function 'void read()': 123.cpp:14: error: conflicting declaration 'char c' 123.cpp:13: error: 'c' has a previous declaration as 'int c' 123.cpp:13: warning: unused variable 'a' 123.cpp:13: warning: unused variable 'b' 123.cpp:13: warning: unused variable 'd' 123.cpp: In function 'int main()': 123.cpp:35: error: expected primary-expression before '}' token 123.cpp:35: error: expected ';' before '}' token 123.cpp:27: warning: unused variable 'n' 123.cpp:27: warning: unused variable 'm' 123.cpp:27: warning: unused variable 'i' 123.cpp:27: warning: unused variable 'j'