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#include<stdio.h>
int add(char s[100]);
main()
{
	char s[100];
	int i,j,sum;
	printf("Enter the string\n");
	gets(s);
	sum=add(&s[0]);
	printf("%d",sum);
}
int add(char s[100])
{
	int i,j,k,l,sum=0;
	for(l=0;s[l]!='\0';l++);
	for(i=0;i<l;i++)
	{
		if(s[i]>='0'&&s[i]<='9')
		sum=sum+(s[i]-48);
	}
	return sum;
}