Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic here
    int sum=0,i=0,sign=1;
    if(str[i]=='-')
    {
        i++;
        sign=-1;
    }
    if(str[i]=='+')
    {
        i++;

    }
    while(str[i]!='\0')
    {
        if(str[i]>='0'&&str[i]<='9')
        {

        
        sum=sum*10+(str[i]-'0');
        i++;
        }
        else
        break;
    }
    return sign*sum;
    
}


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