Compiler output
prog.c: In function 'main':
prog.c:9:4: error: expected identifier or '(' before 'char'
prog.c:29:14: error: 'mer' undeclared (first use in this function)
prog.c:29:14: note: each undeclared identifier is reported only once for each function it appears in
prog.c:29:14: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:29:14: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:29:34: error: 'sur' undeclared (first use in this function)
prog.c:29:34: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:29:34: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:40:13: error: 'head' undeclared (first use in this function)
prog.c:40:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:40:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:51:13: error: 'mar' undeclared (first use in this function)
prog.c:51:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:51:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
