C语言程序设计（第5版）第9章 指针.ppt

#includestdio.hfloatFun1(floatx);floatFun2(floatx);floatIntegral(float(*f)(float),floata,floatb);intmain(){ floaty1,y2; y1=Integral(Fun2,0.0,3.0); y2=Integral(Fun1,0.0,1.0); printf(y1=%f\ny2=%f\n,y1,y2);return0;}/*函数功能：计算函数1+x*x的函数值*/floatFun1(floatx){ return1+x*x;}/*函数功能：计算函数x/(1+x*x)的函数值*/floatFun2(floatx){ returnx/(1+x*x);}/* 函数功能：用梯形法计算函数的定积分*/floatIntegral(float(*f)(float),floata,floatb){ floats,h; intn=100,i; s=((*f)(a)+(*f)(b))/2; h=(b-a)/n; for(i=1;in;i++) { s+=(*f)(a+i*h); } returns*h;}*#includestdio.hfloatFun1(floatx);floatFun2(floatx);floatIntegral(float(*f)(float),floata,floatb);intmain(){ floaty1,y2; y1=Integral(Fun2,0.0,3.0); y2=Integral(Fun1,0.0,1.0); printf(y1=%f\ny2=%f\n,y1,y2);return0;}/*函数功能：计算函数1+x*x的函数值*/floatFun1(floatx){ return1+x*x;}/*函数功能：计算函数x/(1+x*x)的函数值*/floatFun2(floatx){ returnx/(1+x*x);}/* 函数功能：用梯形法计算函数的定积分*/floatIntegral(float(*f)(float),floata,floatb){ floats,h; intn=100,i; s=((*f)(a)+(*f)(b))/2; h=(b-a)/n; for(i=1;in;i++) { s+=(*f)(a+i*h); } returns*h;}*#includestdio.hfloatFun1(floatx);floatFun2(floatx);floatIntegral(float(*f)(float),floata,floatb);intmain(){ floaty1,y2; y1=Integral(Fun2,0.0,3.0); y2=Integral(Fun1,0.0,1.0); printf(y1=%f\ny2=%f\n,y1,y2);return0;}/*函数功能：计算函数1+x*x的函数值*/floatFun1(floatx){ return1+x*x;}/*函数功能：计算函数x/(1+x*x)的函数值*/floatFun2(floatx){ returnx/(1+x*x);}/* 函数功能：用梯形法计算函数的定积分*/floatIntegral(float(*f)(float),floata,floatb){ floats,h; intn=100,i; s=((*f)(a)+(*f)(b))/2; h=(b-a)/n; for(i=1;in;i++) { s+=(*f)(a+i*h); } returns*h;}**主调函数被调函数intmain(void){inta=5,b=9;Swap