The usage of max in C language is as follows.

To effectively use a maximum function in C, given that there isn’t a built-in generic max function for all data types, follow these steps:

Step-by-Step Explanation and Solution

Recognize the Limitation: The C standard library does not provide a universal max function across all data types. However, it offers functions like fmax in <math.h> for floating-point numbers.
Implement Maximum Function for Integers:
Define an inline function to handle integer comparisons.
inline int max_int(int a, int b) { return a > b ? a : b; }
Use Built-in Functions for Floats/Doubles:
Include <math.h> and use fmax or fmaxf for floating-point numbers.
#include <math.h> double max_double(double a, double b) { return fmax(a, b); }
Handle Pointers with Care:
For pointers, ensure they are comparable within the same context before using the ternary operator.
Consider Macros for Simplicity (Optional):
Use macros for quick comparisons but be aware of potential side effects.
#define MAX_INT(a, b) ((a) > (b) ? (a) : (b))

Example Code

#include <stdio.h>
#include <math.h>

inline int max_int(int a, int b) {
    return a > b ? a : b;
}

double max_double(double a, double b) {
    return fmax(a, b);
}

int main() {
    int a = 10, b = 20;
    printf(“Max of integers: %d\n”, max_int(a, b));

    double x = 5.5, y = 4.7;
    printf(“Max of doubles: %.1f\n”, max_double(x, y));

    return 0;
}

#include <stdio.h>

#include <math.h>

inline int max_int(int a, int b) {

return a > b ? a : b;

}

double max_double(double a, double b) {

return fmax(a, b);

}

int main() {

int a = 10, b = 20;

printf(“Max of integers: %d\n”, max_int(a, b));

double x = 5.5, y = 4.7;

printf(“Max of doubles: %.1f\n”, max_double(x, y));

return 0;

}

Explanation

Integer Comparison: The max_int function safely compares two integers and returns the larger one.
Floating-Point Handling: By including <math.h>, we utilize fmax to handle double comparisons efficiently.
Macro Consideration: While macros can offer a quick solution, they are used cautiously here due to potential side effects.

This approach ensures that maximum values for integers and doubles are accurately determined while adhering to C’s standard library capabilities.