98. Convert String to Integer

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

int custom_atoi(const char *str) {
    int i=0;
    int value = 0;
    int sign = 1;
    if(str[i] == '-' || str[i] == '+'){
        sign = 44 - str[i];
        i++;
    }

    while(str[i] <= '9' && str[i] >= '0'){
        value = 10 * value + (str[i] - '0');
        i++;
    }

    return value * sign;
}

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++;
    }

    printf("%d", custom_atoi(str));
    return 0;
}