#include<stdio. h> float mul(float a, float b) mal float x, y, z, printf(“请输入两个数:”) scanf("%f%f", &x, &y) /①* printf("mul(%f, %fF%f,",x, y, z); x=x+10 *对x和y进行变换* lul(x,y); X=x*2 /*再次对x和y进行变换* y=y*2 printf("mul(%f, %f)=%f\n",y, mul(x y)) float mul(float a, float b) return a*b:#include<stdio.h> float mul(float a,float b); main() { float x,y,z; printf(“请输入两个数：”); scanf("%f %f",&x,&y); z=mul(x,y); /*①*/ printf(“mul(%f,%f)=%f, ”, x, y, z); x=x+10; /*对 x 和 y 进行变换*/ y=y-10; mul(x,y); /*②*/ x=x*2; /*再次对 x 和 y 进行变换*/ y=y*2; printf("mul(%f,%f)=%f\n",x,y,mul(x,y)); /*③*/ } float mul(float a,float b) { return a*b; }