src.c: In function 'main':
src.c:7:11: error: invalid type argument of unary '*' (have 'float')
C1=2.0*PI*r;
^
src.c:8:7: error: invalid type argument of unary '*' (have 'float')
Sa=PI*r*r;
^
src.c:9:11: error: invalid type argument of unary '*' (have 'float')
Sb=4.0*PI*r*r;
^
src.c:10:13: error: 'Pl' undeclared (first use in this function)
Va=4.0/3.0*Pl*r*r*r;
^
src.c:10:13: note: each undeclared identifier is reported only once for each function it appears in
src.c:11:7: error: invalid type argument of unary '*' (have 'float')
Vb=PI*r*r*h;
^