Convert String to Integer

Code

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

int custom_atoi(const char *str) 
{
    // Your logic here

    int num =0;
    int sign =1;

  while( *str == ' ' || *str ==' \n' || *str ==' \t')
  {
    str++;
  }

  if(*str == '-')
  {
    sign = -1;
    str++;
  }else if(*str == '+')
  {
    str++;
  }

  while(*str >= '0' && *str<='9')
  {
    num =num *10+(*str - '0');
    str++;
  }

  return sign*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;
}

Solving Approach