Convert a String to Float

Code

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

float custom_atof(const char *str) {
    // Your logic here
    float sign = 1; uint8_t dot = 0;
    float num = 0.0f;
    float fraction = 0.0f;
    float divisor = 10.0f;
    
    if(*str == '+'){
        str++;
    }else if(*str == '-'){
        sign = -1;
        str++;
    }

    while(*str){
        if(*str=='.'){
            dot = 1;
            str++;
            continue;
        }
        
        if(dot==0){
            num = (num*10.0f) + (*str-'0');
        }else if(dot==1){
            fraction += (*str-'0')/divisor;
            divisor *= 10.0f; 
        }

        str++;
    }

    return sign*(num+fraction);

}

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++;
    }

    float value = custom_atof(str);
    printf("%.2f", value);
    return 0;
}

Solving Approach