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Rock-paper-scissors: Difference between revisions
→{{header|C}}
m (→{{header|Java}}: Shortened a bit, no need to total up the throws every round, just count as you go) |
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DRAW 5
COMPUTER_WINS 21</pre>
=={{header|C}}==
<lang C>#include <stdio.h>
#include <stdlib.h>
int rand_i(int n)
{
int rand_max = RAND_MAX - (RAND_MAX % n);
int ret;
while ((ret = rand()) >= rand_max);
return ret/(rand_max / n);
}
int weighed_rand(int *tbl, int len)
{
int i, sum, r;
for (i = 0, sum = 0; i < len; sum += tbl[i++]);
if (!sum) return rand_i(len);
r = rand_i(sum) + 1;
for (i = 0; i < len && (r -= tbl[i]) > 0; i++);
return i;
}
int main()
{
int user_action, my_action;
int user_rec[] = {0, 0, 0};
char *names[] = { "Rock", "Paper", "Scissors" };
char str[2];
char *winner;
while (1) {
my_action = (weighed_rand(user_rec, 3) + 1) % 3;
printf("\nYour choice [1-3]:\n"
" 1. Rock\n 2. Paper\n 3. Scissors\n> ");
if (!scanf("%d", &user_action)) {
scanf("%1s", str);
if (*str == 'q') return 0;
continue;
}
user_action --;
if (user_action > 2 || user_action < 0) {
printf("invalid choice; again\n");
continue;
}
switch ((my_action - user_action + 3) % 3) {
case 0: winner = "We tied."; break;
case 1: winner = "Meself wins."; break;
case 2: winner = "You win."; break;
}
printf("You chose %s; I chose %s. %s\n",
names[user_action], names[my_action], winner);
user_rec[user_action] ++;
}
}</lang>
=={{header|Java}}==
{{works with|Java|1.5+}}
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