sin曲线如何打印不出来呢?

sin曲线怎么打印不出来呢????

include "stdio.h"
#include <math.h>

int _tmain(int argc, _TCHAR* argv[])
{
double y;
int x,m;
for(y=-1;y<=1;y+=0.1)
{
m = sin(y)*10;
for(x=1;x<m;x++)
printf(" ");
printf("*");
for(;x<62-m;x++)
printf(" ");
printf("*\n");
}
return 0;
}

#include <stdio.h>
#include <math.h>

#define PI 3.1415926

int main(void)
{
        double x,y;

        for(y = -1; y <= 1; y = y + 0.1)
        {
                for(x = -PI; x <= PI; x = x + 0.1)
                {
                        if(fabs(y - sin(x)) <= 0.046)
                                printf("*");
                        else
                                printf(" ");
                }
                printf("\n");
        }

        return 0;
}