Displaying floating points in C - c

Question

Right, i have a 2 files (Distance and time) that have different values on their rows, in the program that divides both values on line into their speed and displays on screen.
This works perfectly, however, the function gives the calculated value to the nearest whole number:
#include <stdio.h>
int main()
{
FILE *fTotDc;
FILE *fTotTc;
int CalScD; //Values for total cycling speed
int CalScT;
float CalScS;
char ScSValue[32];
int DataCount=1; //File line comparison
struct store06 //TICtotD
{
char defTotDc[16];
}stock06[512];
struct store08 //TICtotT
{
char defTotTc[16];
}stock08[512];
fTotDc=fopen("TICtotD.txt","r"); //Opens total distance
fscanf(fTotDc,"%16[^\n]%*.2f", stock06[DataCount].defTotDc);
fTotTc=fopen("TICtotT.txt","r"); //Opens total time
fscanf(fTotTc,"%16[^\n]%*.2f", stock08[DataCount].defTotTc);
printf("|Distance |Time |Speed |");
printf("\n");
printf("|%-16s", stock06[DataCount].defTotDc);
printf("|%-16s", stock08[DataCount].defTotTc);
CalScD = atoi(stock06[DataCount].defTotDc); //Totals are converted to int for calculation
CalScT = atoi(stock08[DataCount].defTotTc);
if(CalScT == 0) //Test for 1/0 error, There is also a failsafe in the edit function which checks for t=0;
{
if(CalScD == 0) //If distance is 0 (As it is by default), the speed is 0.
{
printf("|0 ");
}
else //If distance is not 0 , we have (1/0)*k, which doesn't exist.
{
printf("|Error, Time is 0");//Error message given.
}
}
else
{
CalScS = CalScD/CalScT;
snprintf(ScSValue,32,"%.2f", CalScS); //Turns this int value into a string
printf("|%-16s",ScSValue); //String outputted
}
printf("|"); //last column
getch();
}
This is the code for one line, given that this on a do-while loop until the end of the file.
Input (distance file): Line 1: 4 , (time file) Line 1: 1 .
Expected speed output: 0.25
Actual output: 0.00
Edit: My coding skills are RIP
Edit 2: The mistake, assuming interger/interger would automatically calculate a floating point value. I have changed the code accordingly, it works. Thank you guys.

Answer 1

In CalScS = CalScD/CalScT; first the integer division is executed, then the resulting value is converted to float and assigned to the variable.
Try this
CalScS = CalScD/(double)CalScT;
To first convert the denominator to floating point, then do the division and assign correctly.
Oh ... and (almost) always prefer double to float.

Answer 2

Your calculation line CalScS = CalScD/CalScT; is doing integer division, since both operands are integers.
You need one (or both) of the operands to be floats (or doubles) to get floating-point division.

Answer 3

In your code
int CalScD; //Values for total cycling speed
int CalScT;
both are of type int, and CalScS is of type float.
While calculating the division using
CalScS = CalScD/CalScT;
first, the division will be performed as integer division [resulting in an int value] and after that, the int result will be promoted to float. That's why you're getting the integer output.
change
CalScS = CalScD/CalScT;
to
CalScS = ((float)CalScD )/CalScT;
to enforce the floating point division.