程序及报错如下，敬请高手指教：

#include <ansi_c.h> #include <math.h> #define max 1000 zero(a,b) double a, b; { 此处为错误1 int times=0; double x; do { x=(a+b)/2; if((sin(x)*sin(a))>0) a=x; else b=x; if(times++>max) { printf("too many times!\n"); return ; } }while(fabs(a-b)>1E-6); if((sin(a)*sin(b))<0) printf("zero=%1f\n",x); else printf("There is no zero point!"); return; } main( ) { double m, n; printf("Input Datanumber: m=? n=?\n"); scanf("%1f%1f", &m, &n); zero(m,n); 此处为错误2 } a.c - 2 errors 7, 3 Missing prototype. 37, 8 Missing prototype.