Convert String to Integer

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

int custom_atoi(const char *str) {
    // Your logic here
    
    int i=0;
    int sign_chek=1;
    int result=0;

    if(str[i]=='-')
    {
        sign_chek=-1;
        i++; //1st digidt (-) saved
    }
    else if(str[i]=='+')
        {
            i++;
        }

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

}

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;
}