#include <stdio.h>
int ch_str(char* str,char ch);
int sum_of_digits(char* str);
int sum_of_decimal(char* str);
int main(){
    char ch='A';
    char str[10]={'A','b','2','4','f','5','g'};
    printf("%d\n",ch_str(str,ch));
    printf("%d\n",sum_of_digits(str));
    printf("%d\n",sum_of_decimal(str));


return 0;
}
int ch_str(char* str,char ch){
    int i=0;
    while(str[i]){
        if(str[i]==ch)
            return i;
           else i++;
    }
return -1;
}
int sum_of_digits(char* str){
    int i=0;
    int sum=0;
    while(str[i]){
        if (str[i]>='0' && str[i]<='9')
            sum+=str[i]-'0';
        i++;
    }
return sum;
}
int sum_of_decimal(char* str){
    int i=0;
    int sum,current=0;
        while(str[i]){
            if (str[i]>='0' && str[i]<='9'){
                current=current*10 + str[i] - '0';
                i++;
            }
        i++;
        sum+=current;
        current=0;
        }

    return sum;
}