char *strreplace(const char * str, const char * find, const char * replace){
	unsigned int i,j,k,pos, val, size, oldsize, cont;
	unsigned int bytes = strlen(str)-strlen(find)+strlen(replace);
	int flag;
 
	char * nstr = (char*)malloc(bytes+1);
	memset(nstr, 0, bytes+1);
 
	for(i = 0; i <= strlen(str)-strlen(find); i++){
		flag = 1;
		val = i;
		k = 0;
		// unsigned int z = (i+strlen(find)-1);
		for(j=i; j<=(i+strlen(find)-1); j++){
			if(find[k] != str[j])
				flag = 0;
			k++;
		}
 
		if(flag != 0)
			pos = val;
	}
 
    size = pos + strlen(replace) - 1;
    oldsize = pos + strlen(find);
	cont = 0;
	j = 0;
 
    for(i=0;i<=bytes-1;i++){
        if(i>=pos && i<=size){
            nstr[i] = replace[cont];
            cont++;
            if(i==size)
                j=oldsize;
        } else {
            nstr[i] = str[j];
            j++;
        }
    }
 
	return nstr;
}