清华大学出版社 TSINGHUA UNIVERSITY PRESS 例91 #define pi 3. 1415926 main Float l, s, r, v: printf(input raDius. ); scanf(%of, &r); =2.0*PEre s=Prror v=3.0/42PI“ rrsr; printf(l-=%010.4fns=%10.4fnv=%104fn",I, S,例9.1 #define PI 3.1415926 main() ｛float l，s，r，v; printf("input raDiuS∶"); scanf("%f"，&r); l=2.0*PI*r; s=PI*r*r; v=3.0/4*PI*r*r*r; printf("l=%10.4f\nS=%10.4f\nv=%10.4f\n"，l，s， v); ｝