multiplication test

[AdilSaumtally]

my assingnment is to design an application that will generate two random operands that will formulate a question in the form:
5 x 2 =

Assuming 5 and 2 are the randomly generated operands.

The user at this point will enter the answer followed by the enter key. The entered value is compared with the computer calculated answer. If they are the same, a counter representing the correctly answered questions is incremented; along with a message indicating the answer was answered correctly. If the answer entered is incorrect, then a message indicating the answer was incorrectly answered should be displayed.

Each test comprises of 10 questions; The question number will be displayed as a prefix to the question displayed.

After the 10 questions have been answered, the score as a percentage is displayed. e.g. “You answered 70% of the questions correctly”

The user is then asked if they would like another go? Entering ‘Y’ will start the test again, after clearing the screen.


so far my code is

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
int firstrandom;                            //first random number to be generated declared as an integer
int secondrandom;                            //second random number to be generated declared as an integer
int guess;                                
int answer;
int counter;
int quesnum;
 
void main (void)
 
{
    printf("What is the product of the following questions?\n\n");
 
 
    srand (time(NULL));
    firstrandom = rand() % 12 + 1;
    secondrandom = rand() % 12 + 1;
    answer = firstrandom * secondrandom;
    printf("Q1\n\n");
    printf("%d\n", firstrandom); 
    printf("%d\n", secondrandom);
}
 
 

i dont know how to make it check whether the answer given by the user is correct or not and make it loop 10 times for the test... also how to make the question numbers got one up

[whodgson]

If m and n are assumed to be the two random numbers....user provided 'ans' will be correct if it == m*n else it will be incorrect.

[AdilSaumtally]

thanks for the multiplicattion...,
i have this code now:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
int firstrandom;                            //first random number to be generated declared as an integer
int secondrandom;                            //second random number to be generated declared as an integer
int guess;                                
int answer;
int correctcounter;
int qnum;
int fnlprcnt;
 
void main (void)
 
{
    printf("What is the product of the following questions?\n\n");
    qnum = 0;
    correctcounter = 0;
 
 
    for(qnum=0; qnum<10;qnum)
 
        do 
            {
                    qnum++;
                    printf("Q%d\n\n", qnum);
                    srand (time(NULL));
 
                    firstrandom = rand() % 12 + 1;
                    secondrandom = rand() % 12 + 1;
                    printf("%d x %d\n", firstrandom, secondrandom);
                    answer = firstrandom * secondrandom;
 
                    //printf("%d\n", firstrandom); 
                    //printf("%d\n", secondrandom);
 
                    printf("%d\n", answer);
 
 
 
                    scanf("%d", &guess);
 
                    if (guess > answer)
                        printf("incorrect\n");
 
                    if (guess < answer)
                        printf("incorrect\n");
 
                    if(guess == answer)
                        printf("Correct\n");
                        correctcounter++;
 
            }
 
 
        while (guess != answer);
 
            fnlprcnt = correctcounter / 10 * 100;
            printf("Well Done, you have completed the test. Your scored %d percent\n", fnlprcnt);
 
 
 
 
}
 
 

when i run the program it loops and stops at q10 if i get the last question right
if i get q10 wrong it carrys on... any ideas?

[whodgson]

Your while loop end condition is 'guess != answer' so it will continue until a correct answer arrives and i don`t think the for loop is doing anything(i.e. it has no enclosing braces {})
BTW incrementing the for loop in its body is not considered good practice.

[AdilSaumtally]

thanks or the advice... i have changed the while statement to

while (qnum != 10);
 

for it to cut off at the 10th question

the only part i am struggling on now is getting it to ask whether the user would like to try again and then run the code again.

e.g.

printf("would you like to try again? 1 for yes and 2 for no")
 

its just i dont know where to start to make it scan for the input and whether i need to declare anymore variables

please help and thanks for the hep you have already given to me =)

[whodgson]

You could put all this code plus the question "go again?" in a do while loop with the end condition while (response == 'y' ||response== 'Y') and i suppose it would not hurt to include at the end of this loop (and the last line):
if(response== 'n'||response == 'N')break;
good luck