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Parse Comma-Separated Integers into an Array

Code

#include <stdio.h>
#include <stdint.h>

void parse_csv_to_array(const char *str, uint8_t *arr, uint8_t *count) {
    // Your logic here
    uint8_t * arr_ptr = arr;
    while(*str != '\0'){
        int value = 0;
        int digit = 0;
        while(*str != ',' && *str != '\0'){
            value *= 10;
            digit = (int)(*str - '0');
            value+=digit;
            str++;
        }
        // we hit a comma or the end
        *arr_ptr = value;;
        arr_ptr++;
        if(*str == ',')
            str++;
        (*count)++;
    }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    uint8_t arr[20];
    uint8_t count = 0;
    parse_csv_to_array(str, arr, &count);
    for (uint8_t i = 0; i < count; i++) {
        printf("%u", arr[i]);
        if(i < count - 1){
            printf(" ");
        }
    }
    return 0;
}

Solving Approach

 

 

 

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Input

10,20,30

Expected Output

10 20 30