View Compilation Error

213806_0_22658.c:1:19: studio.h: No such file or directory
213806_0_22658.c: In function `main':
213806_0_22658.c:7: error: `EOF' undeclared (first use in this function)
213806_0_22658.c:7: error: (Each undeclared identifier is reported only once
213806_0_22658.c:7: error: for each function it appears in.)
213806_0_22658.c:8: error: `sum' undeclared (first use in this function)