int
main ()
{
int x, y;
char op;
scanf ("%d%c%d", &x, &op, &y); // 5+4 8*9 11-6
switch (op)
{
case '+':
printf ("%d+%d=%d\n", x, y, myadd (x, y));
break;
case '-':
printf ("%d-%d=%d\n", x, y, mysub (x, y));
break;
case '*':
printf ("%d*%d=%d\n", x, y, mymul (x, y));
break;
case '/':
printf ("%d/%d=%d\n", x, y, mydiv (x, y));
break;
default:
break;
}
return 0;
}
main()
{
int x, y, z;
printf("Pls enter x,y:");
scanf("%d%d",&x,&y);
printf("x = %d y = %d\n",x,y);
z = myadd(&x, &y);
printf("z = %d + %d = %d\n",x,y,z);
}
int
main(int argc, char *argv[]) {
float ztot, yran, ymult, ymod, x, y, z, pi, prod;
long int low, ixran, itot, j, iprod;
printf("Starting PI...\n");
ztot = 0.0;
low = 1;
ixran = 1907;
yran = 5813.0;
ymult = 1307.0;
ymod = 5471.0;
itot = 12000;
for(j=1; j<=itot; j++) {
/*
c X and Y are two uniform random numbers between 0 and 1.
c They are computed using two linear congruential generators.
c A mix of integer and real arithmetic is used to simulate a
c real program. Magnitudes are kept small to prevent 32-bit
c integer overflow and to allow full precision even with a 23-bit
c mantissa.
*/
iprod = 27611 * ixran;
ixran = iprod - 74383*(long int)(iprod/74383);
x = (float)ixran / 74383.0;
prod = ymult * yran;
yran = (prod - ymod*(long int)(prod/ymod));
y = yran / ymod;
z = x*x + y*y;
myadd(&ztot,&z);
if ( z <= 1.0 ) {
low = low + 1;
}
}
printf(" x=%8.5f y=%8.5f low=%7d j=%7d\n",x,y,low,j);
pi = 4.0 * (float)low/(float)itot;
printf("Pi = %9.6f ztot=%12.2f itot=%8d\n",pi,ztot,itot);
return 0;
}
int main(void){
myadd();
return 0;
}
