fzu 1171 Hard to Believe, but True!

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;

int main()
{
    int i,len,a,b,c;
    char s[100];
    while(~scanf("%s",s))
    {
        a=b=c=0;
        int len=strlen(s);
        for(i=len-1;s[i]!='=';i--)
            a=a*10+s[i]-'0';
        i--;
        for(;s[i]!='+';i--)
            b=b*10+s[i]-'0';
        i--;
        for(;i>=0;i--)
            c=c*10+s[i]-'0';
            //printf("%d %d %d
",a,b,c);
        if(a==b+c) printf("True
");
        else printf("False
");
    }
    return 0;
}