C Implementation of the iota Function (Increasing Sequence)

The “iota” function is not a part of the standard C library. However, it’s available in the C++ Standard Library, specifically in the <numeric> header file, where it generates an increasing sequence.

The equivalent functionality can be implemented in C. The following function, named iota, fills an array with an increasing sequence starting with a given value.

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#include <stdlib.h>
 
void iota(int* arr, size_t size, int start) {
    for (size_t i = 0; i < size; i++) {
        arr[i] = start + i;
    }
}

#include <stdlib.h>

void iota(int* arr, size_t size, int start) {
    for (size_t i = 0; i < size; i++) {
        arr[i] = start + i;
    }
}

This function takes three parameters:

• arr is the array to be filled with an increasing sequence
• size is the size of the array
• start is the starting number of the sequence

The function then iterates over the array, assigning each element a value which is the sum of the starting number and the current index.

The function modifies the array in-place and does not return a value. This design choice was made to avoid dynamic memory allocation inside the function, which would require the caller to free the memory afterwards to prevent memory leaks. This way, the caller has full control over the memory used for the array.

–EOF (The Ultimate Computing & Technology Blog) —