Question

Given input as a string, return an integer as the sum of all numbers found in the string

Input: xyzonexyztwothreeeabrminusseven
Output : 1 + 23 + (-7) = 17

Comments

do you mean sum of ascii representation of chars

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I think question is very clear here its not about the ascii representation rather the word present in the string, look at the sample input and output provided in the question.

Answer 1

Not the exact solution but you can refer this program to get your job done.

#include<stdio.h>
#include<string.h>
void getSubString(char *ptr,int i);
int getSum(char *ptr,char *temp,int i);
main()
{
        char str[100];
        printf("Enter a string : ");
        scanf("%[^\n]",str);
        int i=0,sum=0;
        while(str[i])
        {
                str[i]=toupper(str[i]);
                i++;
        }
        char subStr[10];

        for(i=0;i<10;i++)
        {
                getSubString(subStr,i);
                sum=sum+getSum(str,subStr,i);
        }
        printf("SUM = %d\n",sum);
}
int getSum(char *ptr,char *subPtr,int num)
{
        char *temp=NULL;
        int sum=0;
        while(*ptr)
        {
                temp=strstr(ptr,subPtr);
                if(temp==NULL)
                        return sum;
                sum=sum+num;
                ptr=temp;
                ptr++;
        }
        return sum;
}
void getSubString(char *ptr,int i)
{
        switch(i)
        {
                case 0:
                        strcpy(ptr,"ZERO");
                        break;
                case 1:
                        strcpy(ptr,"ONE");
                        break;
                case 2:
                        strcpy(ptr,"TWO");
                        break;
                case 3:
                        strcpy(ptr,"THREE");
                        break;
                case 4:
                        strcpy(ptr,"FOUR");
                        break;
                case 5:
                        strcpy(ptr,"FIVE");
                        break;
                case 6:
                        strcpy(ptr,"SIX");
                        break;
                case 7:
                        strcpy(ptr,"SEVEN");
                        break;
                case 8:
                        strcpy(ptr,"EIGHT");
                        break;
                case 9:
                        strcpy(ptr,"NINE");
                        break;
                default:
                        break;
        }
}