?? 10elr20.c
字號:
#include "stdio.h"
#include "10elr2.c"
main()
{ int i,j;
void elr2f(double,double [],int,double []);
double t,h,eps,y[3];
y[0]=-1.0; y[1]=0.0; y[2]=1.0;
t=0.0; h=0.01; eps=0.00001;
printf("\n");
printf("t=%5.2f\n",t);
for (i=0; i<=2; i++)
printf("y(%d)=%e ",i,y[i]);
printf("\n");
for (j=1; j<=10; j++)
{ elr2(t,h,y,3,eps,elr2f);
t=t+h;
printf("t=%5.2f\n",t);
for (i=0; i<=2; i++)
printf("y(%d)=%e ",i,y[i]);
printf("\n");
}
}
void elr2f(t,y,n,d)
int n;
double t,y[],d[];
{ t=t; n=n;
d[0]=y[1]; d[1]=-y[0]; d[2]=-y[2];
return;
}
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