Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic her
    int i,j,x,sum;
    sum=0;
    int sign=1;
    x=strlen(str);
    for(i=0;i<x;i++){
        if (str[i]=='-')
        sign=-1;
        else if (str[i]=='+')
        sign=+1;
   else if((str[i]>='0')&&(str[i]<='9'))
    sum=sum*10+(str[i]-48);
    else
    break;
    }

    return sum*sign;
}

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