計算機房上機實驗守則-文庫吧
2025-10-30 23:45 本頁面
【正文】 maxlength]。float n。floatlagrange(floata[],floatf[],float x,int n){int k=0,j。floaty=,l。while(k{l=。// printf(“%lfn”,y)。for(j=0。j{if(j!=k){l=l*(xa[j])/(a[k]a[j])。// printf(“%lfn”,l)。}}//printf(“%lfn”,f[k])。// printf(“%lfn”,l)。y=y+l*f[k]。k++。}printf(“x=%f,y=%fn”,x,y)。return y。}float fx1(floatx){return(1/(1+x*x))。}floatfx2(floatx){return exp(x)。}floatfx3(float x){return sqrt(x)。}void math1(float c,float n){int i=0。float h。h=2*c/n。while(i{a[i]=i*h5。i++。}}void math2(){int i=0。while(i{a[i]=cos((2*i+1)*pi/2/(n+1))。i++。}}int main(){n=20。int i。math1(5,n)。for(i=0。i{f[i]=fx1(a[i])}lagrange(a,f,n)。return 0。}龍貝格include include include double t[1000],r[1000]。double f(double x){return(x*x*exp(x))。}int main(){double h,a,b,e。int i,N,m。scanf(“%lf,%lf,%d,%lf”,amp。a,amp。b,amp。N,amp。e)。h=ba。m=0。t[1]=*h*(f(a)+f(b))。printf(“%lf”,t[1])。r[0]=t[0]。while(1){printf(“n”)。fo
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