写一个用矩形法求定积分的通用函数,分别求正弦,余弦和自然对数幂函数的...答:break;case 2:p=fun2;break;case 3:p=fun3;break;case 0:return 0;} printf("请输入积分上下限:\n下限a:");scanf("%lf",&a);printf("上限b:");scanf("%lf",&b);sum=integral(a,b,p);printf("第%d种函数在(%g,%g)范围内的定积分为:%f.\n",type,a,b,sum);} } ...
C语言编程:求cosx sinx 2x+1 在(a,b)的定积分 ab的值从键盘输入。(1...答:double line(double x);double integral(double a, double b, double (*p)(double), double n);int main(){ printf("%lf\n",integral(1,2,&cosx,100));printf("%lf\n",integral(2,3,&sinx,100));printf("%lf\n",integral(3,4,&line,100));return 0;} double integral(double a...