CODEWITHSUNDEEP
carraysfor-loopinput
Shaan Khokhar
Shaan Khokhar

Reputation: 5

How to check array inputs are positive if in for loop

I am attempting to use this code to ensure if a negative value is entered, it'll be recognised as an invalid input and require the user to retype the scores.

I am unsure why this isn't being found, though I do believe it may have to do with my array indexing. Here's my code:

#include <stdio.h>
#include <string.h>

double quiz_1(){
    int test_scores[3];
    double result;

    printf("Please Enter The Students Test Score (e.g. 85 65 75): ");

    for (int i = 0; i < (sizeof test_scores / sizeof test_scores[0]); i++) {
        if(scanf("%d", &test_scores[i]) < 0){
             printf("\nInvalid Input\nPlease Enter The Students Test Score (e.g. 85 65 75): ");
             i = 0;
         }
    }

result = (test_scores[0] * 0.2) + (test_scores[1] * 0.3) + (test_scores[2] * 0.5);

printf("\nThe Student's Final Grade is %.2f", result);

return 0;

}

int main() {
   quiz_1();
   return 0;
}

Upvotes: 0

Views: 109

Answers (1)

ZachB
ZachB

Reputation: 15386

scanf returns the number of items of the argument list successfully filled. I think you're meaning to test if (test_scores[i] < 0).

Upvotes: 1

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