c语言单级响应矩形位置,YTU 2421: C语言习题 矩形法求定积分

主函数已给定如下，提交时不需要包含下述主函数

/* C代码 */

int main()

{

float integral(float (*p)(float),float a,float b,int n);

float a1,b1,a2,b2,a3,b3,c,(*p)(float);

float fsin(float);

float fcos(float);

float fexp(float);

int n=20;

scanf("%f%f",&a1,&b1);

scanf("%f%f",&a2,&b2);

scanf("%f%f",&a3,&b3);

p=fsin;

c=integral(p,a1,b1,n);

printf("The integral of sin(x) is :%.2f

",c);

p=fcos;

c=integral(p,a2,b2,n);

printf("The integral of cos(x) is :%.2f

",c);

p=fexp;

c=integral(p,a3,b3,n);

printf("The integral of exp(x) is :%.2f

",c);

return 0;

}

/* C++代码 */

int main()

{

float integral(float (*p)(float),float a,float b,int n);

float a1,b1,a2,b2,a3,b3,c,(*p)(float);

float fsin(float);

float fcos(float);

float fexp(float);

int n=20;

cin>>a1>>b1;

cin>>a2>>b2;

cin>>a3>>b3;

cout<

cout<

p=fsin;

c=integral(p,a1,b1,n);

cout<

p=fcos;

c=integral(p,a2,b2,n);

cout<

p=fexp;

c=integral(p,a3,b3,n);

cout<

return 0;

}