Sample Code

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// Scissors Paper Rock
// COMP1511 Revision Session (T1, 2022)
// Written by Jasper Di Francesco for CSESoc x WIT 1511 revision session
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// Returns 1 if valid move, 0 if not
int validmove(char a) {
    return (a=='S' || a=='R' || a=='P');
}
// Returns 0 if draw, 1 if p1 wins and -1 if p1 loses
int wld(char p1, char p2) {
    if (p1 == p2) return 0;
    if ((p1 == 'S' && p2 == 'P') ||
        (p1 == 'P' && p2 == 'R') ||
        (p1 == 'R' && p2 == 'S'))
        return 1;
    return -1;
}
int main (void) {
    char p1[10];
    char p2[10];
    // We only need to keep track of player 1's score
    int p1Score = 0;
    // Collect input from stdin
    fgets(p1, 10, stdin);
    fgets(p2, 10, stdin);
    // Check each move
    // Note incrementing by 2 so we are ignoring where there should be spaces
    // In thahhis case, the string RLPUS will still be considered valid
    for (int i = 0; i < 5; i += 2) {
        if (!validmove(p1[i]) || !validmove(p2[i])) {
            printf("Moves invalid!\n");
            return 1;
        }
        p1Score += wld(p1[i], p2[i]);
    }
    // If p1Score is 0, draw, greater than 0 we have won else lost
    if (p1Score == 0) printf("It's a draw!\n");
    if (p1Score < 0) printf("Player 2 won!\n");
    if (p1Score > 0) printf("Player 1 won!\n");
}