?? relax2.c
字號:
void relax2(double **u, double **rhs, int n){ int i,ipass,isw,j,jsw=1; double foh2,h,h2i,res; h=1.0/(n-1); h2i=1.0/(h*h); foh2 = -4.0*h2i; for (ipass=1;ipass<=2;ipass++,jsw=3-jsw) { isw=jsw; for (j=2;j<n;j++,isw=3-isw) { for (i=isw+1;i<n;i+=2) { res=h2i*(u[i+1][j]+u[i-1][j]+u[i][j+1]+u[i][j-1]- 4.0*u[i][j])+u[i][j]*u[i][j]-rhs[i][j]; u[i][j] -= res/(foh2+2.0*u[i][j]); } } }}?? 快捷鍵說明
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