void test_functions() {
double x, y;
te_variable lookup[] = {{"x", &x}, {"y", &y}};
int err;
te_expr *expr;
for (x = -5; x < 5; x += .2) {
cross_check("abs x", fabs(x));
cross_check("acos x", acos(x));
cross_check("asin x", asin(x));
cross_check("atan x", atan(x));
cross_check("ceil x", ceil(x));
cross_check("cos x", cos(x));
cross_check("cosh x", cosh(x));
cross_check("exp x", exp(x));
cross_check("floor x", floor(x));
cross_check("ln x", log(x));
cross_check("log10 x", log10(x));
cross_check("sin x", sin(x));
cross_check("sinh x", sinh(x));
cross_check("sqrt x", sqrt(x));
cross_check("tan x", tan(x));
cross_check("tanh x", tanh(x));
for (y = -2; y < 2; y += .2) {
if (fabs(x) < 0.01) break;
cross_check("atan2(x,y)", atan2(x, y));
cross_check("pow(x,y)", pow(x, y));
}
}
}
int input()
{
int x=0,y=0,number=0,result=0;
char num[3]=" ";
char opt[3]=" ";
char temp=' ';
opt[2]='\n';
printf("\n x y number : ");
result=scanf("%c",&opt[0]);
if(opt[0]=='s')
return SUBMIT;
else if(opt[0]=='q')
return QUIT;
x=atoi(opt);
result+=scanf(" %d",&y);
result+=scanf(" %c",&temp);
clear();
opt[0]=temp;
if(result!=3)
{
printf("invalid input\n");
return -1;
}
if(opt[0]=='d')
number=-1;
else
number=atoi(opt);
if(x>=1 && x<=9 && y>=1 && y<=9)
{
if( fixed[x-1][y-1]!=0 && number!=0)
{
if(number>=1 && number<=9)
{
if(cross_check(x-1,y-1,number)==alreadyis || square_check(x-1,y-1,number)==alreadyis )
{
printf("your input was %d, and %d is already exist.\n",number,number);
return alreadyis;
}
usersol[x-1][y-1]=number;
sprintf(num,"%d",number);
display[x-1][y-1]=num[0];
return 0;
}
else if(number==-1)
{
usersol[x-1][y-1]=0;
display[x-1][y-1]=' ';
return 0;
}
}
else
{
printf("your input was %d, %d, %d . you can't change original setting\n",x,y,number);
return -1;
}
}
else
{
printf("your input was %c %d %c, please check your input\n",opt[0],y,temp);
return -1;
}
}
