Convert String to Integer

Code

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

int custom_atoi(const char *str) {
    // Your logic here
    int num=0,sign=1;
    if((int)*str==45){
        sign=-1;
        str=str+1;
    }
    if((int)*str==43){
        sign=+1;
        str=str+1;
    }
    while(true){
        if(((int)*str>=48)&&((int)*str<=57)){
            int a= (int)*str-48;
            //printf("%d ",(int)('+'));
            num=num*10+a;
        }
        else{
            break;
        }
        str++;
    }
    return num*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