"Mathematics" task

Question

Hi all. I'm solving a "Mathematics" problem in C. I wrote the code, but I can not understand why task 4 does not work.
https://code.sololearn.com/c455AXy4FVfr/?ref=app

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Find which math expression matches the answer that you are given, if you have an integer answer, and a list of math expressions.

Task:
Test each math expression to find the first one that matches the answer that you are given.

Input Format:
Two inputs: an integer and a space separated string of math expressions. The following operations need to be supported: addition +, subtraction -, multiplication *, division /.
An expression can include multiple operations.

Output Format:
A string that tells the index of the first math expression that matches. If there are no matches, output 'none'.

Sample Input:
15
(2+100) (5*3) (14+1)

Sample Output:
index 1

Explanation:
Index counting starts at 0, so '(5*3)' is at index 1 and matches your answer of 15.

Answer 1

I am assuming by task 4 you're referring to the 4th expression

E.g.
12
(5-4) (4*5) (5+10) (4*3)
Outputs: none

scanf("%s %s %s", index1, index2, index3);
^^^Here in this line, there supposed to be only three expressions

else if(answer == func(index3)){
printf("index 2");
}else{
printf("none"); // here, anything other than the first 3 expressions will output none
}

Use loop to take input and if else won't work cause you can't add infinite if else.

Answer 2

Dmitry
I tested the code with

-1
{blank line}

And it outputs "index 0"
Not sure how it worked out that way in the code.

Anyways, just wanted to let you know about it, I haven't looked deep into it ...

Answer 3

Thanks for the help. Changed the code as suggested Kashyap Kumar. All tests passed.

int count = 0;
bool ind = false;
while(scanf("%s", index1) == 1){
if(func(index1) == answer){
ind = true;
break;
}
count++;
}
if(ind == true){
printf("index %d", count);
}else{
printf("none");
}

Answer 4

Ipang
Corrected the code to reflect your correction, but test 4 still fails

Answer 5

Provide inputs and expected outputs. Your question doesn't explain the problem.