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Separate sum accumulator from average in Multidimensional Arrays exercise #886

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Separate sum accumulator from average in Multidimensional Arrays exercise #886

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12 changes: 7 additions & 5 deletions tutorials/learn-c.org/en/Multidimensional Arrays.md
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Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,7 @@ Tutorial Code

int main() {
/* TODO: declare the 2D array grades here */
float sum;
float average;
int i;
int j;
Expand All @@ -92,9 +93,9 @@ Tutorial Code

/* TODO: complete the for loop with appropriate terminating conditions */
for (i = 0; i < ; i++) {
average = 0;
sum = 0;
for (j = 0; j < ; j++) {
average += grades[i][j];
sum += grades[i][j];
}

/* TODO: compute the average marks for subject i */
Expand All @@ -118,6 +119,7 @@ Solution

int main() {
int grades[2][5];
float sum;
float average;
int i;
int j;
Expand All @@ -135,13 +137,13 @@ Solution
grades[1][4] = 87;

for (i = 0; i < 2; i++) {
average = 0;
sum = 0;

for (j = 0; j < 5; j++) {
average += grades[i][j];
sum += grades[i][j];
}

average /= 5.0;
average = sum / 5.0;
printf("The average marks obtained in subject %d is: %.2f\n", i, average);
}

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