Convert String to Integer

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

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

    }
    if (neg_flag){num = -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;
}