Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic here
    uint8_t i=0;
    int num=0;
    while(*(str+i)!='\0'){
        char ch=*(str+i);
        if (ch>='0' && ch<='9')
            num=(num*10)+ch-'0';

        else if(ch=='+' || ch=='-');

        else 
            break;
        i++;
    }
    if (*str == '-')
        num*=(-1);

    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;
}

Solving Approach