Convert Float to Int in C: Guide

In C language, you can convert floating-point numbers to integers using type casting. Some specific methods include:

1. Type conversion: converting a floating point number directly to an integer, discarding the decimal part. For example:
2. Convert the floating-point number 3.14 to an integer, and store the result in the variable ‘result’.
3. C language provides a few math library functions such as ceil(), floor(), and round() that can be used to convert floating-point numbers to integers.
4. ceil() function: Rounds a floating-point number up to the nearest integer greater than or equal to the given floating-point number.
5. floor() function: Rounds a floating-point number down to the nearest integer that is less than or equal to the given floating-point number.
6. round() function: rounds a decimal number to the nearest whole number.
7. For example,
8. #include
   …
   float num = 3.14;
   int result = ceil(num); // round up
   int result2 = floor(num); // round down
   int result3 = round(num); // round to nearest integer
9. In C language, there are type conversion functions like ceilf(), floorf(), and roundf(), which are specifically used to convert floating-point numbers to integers. These functions return a float type result that needs to be further converted to an int type.
10. For example:
11. Include the math header file and declare a float variable ‘num’ with a value of 3.14. Use the ceilf function to round ‘num’ up to the nearest integer and store it in ‘result’. Use the floorf function to round ‘num’ down to the nearest integer and store it in ‘result2’. Use the roundf function to round ‘num’ to the nearest integer and store it in ‘result3’.

It should be noted that there may be precision loss or overflow issues when converting floating-point numbers to integers, so it is important to choose the appropriate conversion method based on the actual situation.