98. Convert String to Integer

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

int custom_atoi(const char *str) {
    // Your logic here
    int num = 0;
    bool sign = 0; // 0 is +, 1 is -
    while(*str != '\0'){
        if(*str == '-'){
            sign = 1;
        } else if (*str == '+'){
            ;
        } else if (*str >= '0' && *str <= '9'){
            num = 10*num + (*str - '0');
        } else {
            break;
        }
        str++;
    }
    if (sign){
        num = 0 - num;
    }
    return num;
}

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;
}