Declared variable not showing up in Locals of Debugger - c

Question

This is a simple program to calculate the length of lines. All the calculation aspects of the program are done and working.
But I am having trouble on one very simple aspect, the variable "percent_detoured" is declared on line 10 and used on line 83, and printed on line 84. Problem is when executed, everything else runs fine but percent_detoured consistently returns 0.000. When debugged, percent_detoured does not even show as a variable in "Locals".
I am using Pelles C IDE if that helps.
Thanks for the help!
{
float line_value;
int x_1, y_1, x_2, y_2;
float y_intercept;
float distance, greatest_distance, total;
float percent_detoured; // <-- DECLARED HERE (SCROLL ALL THE WAY DOWN TO SEE WHERE IT IS USED)
int count, detour_count;
x_1=1; y_1=1; x_2=1; y_2=1;
greatest_distance = 0; total = 0; count = 0; detour_count = 0;
/* Ask for user input in setting the coordinates of the line */
printf("Enter in the length of the line\n");
scanf("%f", &line_value);
/* If user enters in y coordinates for the line such that the line length is greater
than 10 units, then enter loop and continue looping until the length is smaller or
equal to 10 */
while ( line_value > 10 || line_value < 0)
{
printf("Try Again. Value should be smaller or equal to 10 units\n");
scanf("%f", &line_value);
}
line_value = line_value / 2; //Define the top of the line
printf("Enter x and y coordinates for point 1 and 2\n");
scanf("%d %d %d %d", &x_1, &y_1, &x_2, &y_2);
if ( x_1 == 0 && x_2 == 0 && y_1 == 0 && y_2 == 0 ) //If user enters in 0 0 0 0 right away, then immediately end the program
{
printf("No path lengths have been calculated\n");
}
else
{
/* While the user does not enter in the values 0 0 0 0 for all coordinates, continue while loop */
while ( (x_1 != 0) || (y_1 != 0) || (x_2 != 0) || (y_2 != 0) )
{
y_intercept = y_1 - ( (y_2 - y_1) / (x_2 - x_1) * x_1 ); //Rearrange (y=mx+b) to get (b=y-mx) where b is the y intercept
if ( y_intercept <= line_value && y_intercept >= 0 ) //If the y-intercept of the line from point a to b is between
{ //the top of L and 0, then calculate distance between a and top of L
distance = sqrt( pow(x_1, 2) + pow((y_1 - line_value), 2) )
+ sqrt( pow(x_2, 2) + pow((line_value - y_2), 2) );
detour_count++; //Updating the detour counter
}
else if ( y_intercept >= ( line_value * -1) && y_intercept < 0 ) //If the y-intercept of the line from point a to b is between
{ //the bottom of L and 0, then calculate distance between a and bottom of L
distance = sqrt( pow(x_1, 2) + pow( (y_1 + line_value), 2) )
+ sqrt( pow(x_2, 2) + pow(( y_2 - (line_value * -1) ), 2) );
detour_count++; //Updating the detour counter
}
else
{
distance = sqrt( pow((x_2 - x_1), 2) + pow((y_2 - y_1), 2)); //If shortest path between point a and b does not cross L,
} //then the distance is just the sum of squares of rise and run
if (distance > greatest_distance)
{
greatest_distance = distance; //If the current distance is greater than the previous, set it as the greatest distance
}
total = total + distance; //Total count of distance
count++; //Update general counter
printf("The shortest path is: %f\n", distance);
printf("Enter x and y coordinates for point 1 and 2\n");
scanf("%d %d %d %d", &x_1, &y_1, &x_2, &y_2);
}
}
printf("\nThe average path length: %f\n", (total/count));
printf("The length of the longest path: %f\n", greatest_distance);
percent_detoured = ((detour_count/count) * 100); // <-- USED IT HERE
printf("The percentage of paths involving a detour: %f\n", percent_detoured ); // <-- SHOULD BE PRINTED AS ITS VALUE HERE
return 0;
}

Answer 1

You should use
percent_detoured = ((float)detour_count/count) * 100.0);
Else, both detour_count and count are integers, and int divided by int will give an int. So assuming that detour_count < count, detour_count/count will be rounded to 0, multiplied by 100 (still 0) and finally rounded to float since it is being stored as a float (percent_detoured).
I never used the IDE you mentioned, so I have no clue why it might not be showing up in the debugger. :)