Compile Error
/in/foo.c: In function 'process': /in/foo.c:9:1: error: 'sun' undeclared (first use in this function) sun=0; ^~~ /in/foo.c:9:1: note: each undeclared identifier is reported only once for each function it appears in /in/foo.c:22:1: error: expected ';' before '}' token } ^ /in/foo.c:8:5: warning: unused variable 'ans' [-Wunused-variable] int ans,i; ^~~ /in/foo.c:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^