Question

How to enforce immutability in function arguments to prevent the modification of values in C

Answer 1

#include <stdio.h>

// enforce immutability in function arguments

// Function receives a pointer to immutable data
void print_config(const char *config) {
    // config cannot be modified here
    printf("Config: %s\n", config);

    // config[0] = 'X';  // ERROR: cannot modify const data
}

int main() {
    const char *text = "System Ready";

    print_config(text);

    return 0;
}


/*
run:

Config: System Ready

*/

 

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