Math Quiz for Atari ST (Pure C)
Posted: Mon Aug 26, 2024 11:36 pm
Now that we're starting to mess around with Pure C programming on the Atari ST, it felt like a good idea to make a few little games for the platform. Nothing serious, just some examples. For starters, I have this Math Quiz game taken from my Express BASIC example program.
Download it here: http://www.lucidapogee.com/download.php ... THQUIZ.zip
The download comes with a .PRG executable and .C source.
Source code preview:
Download it here: http://www.lucidapogee.com/download.php ... THQUIZ.zip
The download comes with a .PRG executable and .C source.
Source code preview:
Code: Select all
#include <stdio.h>
/* Math Quiz by Gemino Smothers */
/* Lucid Apogee 2024 */
/* www.lucidapogee.com */
/* Compile with Pure C on Atari ST */
#include <stdlib.h>
#include <math.h>
#include <float.h>
#include <time.h>
char operators[] = "+-*/";
char response;
float rnum = 0;
int difficulty = 0;
int operand1 = 0;
int operand2 = 0;
int operation = 0;
int answer = 0;
int answered = 0;
int incorrect = 0;
int attempt = 0;
void game(void);
void generateproblem(void);
void displayproblem(void);
void checkattempt(void);
void checkscore(void);
void printscore(void);
void r(void);
void main(void){
srand(time(NULL));
puts("\33E");
printf("Math Quiz by Gemino Smothers 2024\n\n");
printf("Solve 100 addition, subtraction, multiplication, and division problems.\n");
printf("For division operations, calculate the largest whole quotient.\n\n");
do{
printf("Start game (y/n)? ");
response = getch();
puts("\33E");
if (response == 'y' || response == 'Y'){
game();
}
}while (response != 'n' && response != 'N');
return;
}
void game(void){
do{
generateproblem();
displayproblem();
checkattempt();
checkscore();
}while (response != 'n' && response != 'N');
printscore();
response = 0;
return;
}
void generateproblem(void){
answered++;
difficulty += 2;
r();
operation = (int) (rnum * 4);
r();
operand1 = (int) (rnum * difficulty);
do{
r();
operand2 = (int) (rnum * difficulty);
}while (operation == 3 && operand2 == 0);
switch (operation){
case 0:
answer = operand1 + operand2;
break;
case 1:
answer = operand1 - operand2;
break;
case 2:
answer = operand1 * operand2;
break;
case 3:
answer = (int) (operand1 / operand2);
}
}
void displayproblem(void){
printf("Problem %d: %d %c %d = ", answered, operand1, operators[operation], operand2);
scanf("%d", &attempt);
printf("\n\n");
return;
}
void checkattempt(void){
while (attempt != answer){
incorrect++;
if (attempt < answer){
printf("Too low.\n\n");
}
if (attempt > answer){
printf("Too high.\n\n");
}
displayproblem();
}
printf("Correct!\n\n");
return;
}
void checkscore(void){
if (answered < 100 && incorrect < 100){
printf("Continue (y/n)? ");
response = getch();
puts("\33E");
}else{
response = 'n';
}
return;
}
void printscore(void){
printf("Questions answered: %d / 100\n", answered);
printf("Incorrect attempts: %d\n\n", incorrect);
if (incorrect >= 25){
printf("That's a lot of wrong answers. You need to practice more!\n\n");
}
if (answered == 100){
printf("You answered all of the math problems. Good work!\n\n");
}
if (answered < 100){
printf("You're going to leave all these problems unsolved? Try again later!\n\n");
}
difficulty = 0;
answered = 0;
incorrect = 0;
return;
}
void r(void){
rnum = (float) rand() / RAND_MAX;
while (rnum == 1){
rnum = (float) rand() / RAND_MAX;
}
return;
}