simpleiterative.h

NewtonIterative法计算方程的解

#define PRECISION	0.000001
#define MAX_Number	10000
/*==================================================================*/
//简单迭代
void SimpleIterative()
{
	int k;
	float x0,x;
	printf("\n\n请输入初始值:\nx0 = ");
	scanf( "%f", &x );
	k=1;	// 开始迭代
	do{
		x0 = x;
		x = f( x0 );
		printf( "\nx%d=%f", k, x );
		++k;
	}while( fabs( x-x0 ) > PRECISION && k < MAX_Number );
	if( k >= MAX_Number )
	{
		printf("\n一般迭代失败于(k=%d)",k);	// 迭代到最大次数还不收敛
	}
	else
	{
		// 收敛, 输出结果
		printf( "\n\n迭代次数：k = %d", k );
		printf( "\n根值：x = %f", x );
	}
}